Add slash command delete operations

- Create `DeleteAllGlobalCommandsAsync`
- Create `DeleteSlashCommandsAsync`

Co-Authored-By: Quin Lynch <49576606+quinchs@users.noreply.github.com>

src/Discord.Net.Rest/Discord.Net.Rest.xml

@@ -2740,6 +2740,15 @@
         <member name="M:Discord.Rest.RestGuild.LeaveAsync(Discord.RequestOptions)">
             <inheritdoc />
         </member>
+        <member name="M:Discord.Rest.RestGuild.DeleteSlashCommandsAsync(Discord.RequestOptions)">
+            <summary>
+                Deletes all slash commands in the current guild.
+            </summary>
+            <param name="options">The options to be used when sending the request.</param>
+            <returns>
+                A task that represents the asynchronous delete operation.
+            </returns>
+        </member>
         <member name="M:Discord.Rest.RestGuild.GetSlashCommandsAsync(Discord.RequestOptions)">
             <summary>
                 Gets a collection of slash commands created by the current user in this guild.

src/Discord.Net.Rest/DiscordRestClient.cs

@@ -125,7 +125,8 @@ namespace Discord.Rest
             => InteractionHelper.BulkOverwriteGuildCommands(this, guildId, commandProperties, options);
         public Task<IReadOnlyCollection<GuildApplicationCommandPermission>> BatchEditGuildCommandPermissions(ulong guildId, IDictionary<ulong, ApplicationCommandPermission[]> permissions, RequestOptions options = null)
             => InteractionHelper.BatchEditGuildCommandPermissionsAsync(this, guildId, permissions, options);
-
+        public Task DeleteAllGlobalCommandsAsync(RequestOptions options = null)
+            => InteractionHelper.DeleteAllGlobalCommandsAsync(this, options);
 
         public Task AddRoleAsync(ulong guildId, ulong userId, ulong roleId)
             => ClientHelper.AddRoleAsync(this, guildId, userId, roleId);

src/Discord.Net.Rest/Entities/Guilds/RestGuild.cs

@@ -256,6 +256,16 @@ namespace Discord.Rest
             => GuildHelper.LeaveAsync(this, Discord, options);
 
         //Interactions
+        /// <summary>
+        ///     Deletes all slash commands in the current guild.
+        /// </summary>
+        /// <param name="options">The options to be used when sending the request.</param>
+        /// <returns>
+        ///     A task that represents the asynchronous delete operation.
+        /// </returns>
+        public Task DeleteSlashCommandsAsync(RequestOptions options = null)
+            => InteractionHelper.DeleteAllGuildCommandsAsync(Discord, this.Id, options);
+
         /// <summary>
         ///     Gets a collection of slash commands created by the current user in this guild.
         /// </summary>

src/Discord.Net.Rest/Entities/Interactions/InteractionHelper.cs

@@ -11,6 +11,16 @@ namespace Discord.Rest
 {
     internal static class InteractionHelper
     {
+        public static Task DeleteAllGuildCommandsAsync(BaseDiscordClient client, ulong guildId, RequestOptions options = null)
+        {
+            return client.ApiClient.BulkOverwriteGuildApplicationCommands(guildId, new CreateApplicationCommandParams[0], options);
+        }
+
+        public static Task DeleteAllGlobalCommandsAsync(BaseDiscordClient client, RequestOptions options = null)
+        {
+            return client.ApiClient.BulkOverwriteGlobalApplicationCommands(new CreateApplicationCommandParams[0], options);
+        }
+
         public static Task SendInteractionResponse(BaseDiscordClient client, IMessageChannel channel, InteractionResponse response,
             ulong interactionId, string interactionToken, RequestOptions options = null)
         {
@@ -348,7 +358,7 @@ namespace Discord.Rest
                 return new GuildApplicationCommandPermission(model.Id, model.ApplicationId, guildId, model.Permissions.Select(
                     y => new ApplicationCommandPermission(y.Id, y.Type, y.Permission)).ToArray());
             }
-            catch(HttpException x)
+            catch (HttpException x)
             {
                 if (x.HttpCode == System.Net.HttpStatusCode.NotFound)
                     return null;
@@ -365,7 +375,7 @@ namespace Discord.Rest
 
             List<ApplicationCommandPermissions> models = new List<ApplicationCommandPermissions>();
 
-            foreach(var arg in args)
+            foreach (var arg in args)
             {
                 var model = new ApplicationCommandPermissions()
                 {
@@ -391,7 +401,7 @@ namespace Discord.Rest
 
             List<ModifyGuildApplicationCommandPermissions> models = new List<ModifyGuildApplicationCommandPermissions>();
 
-            foreach(var arg in args)
+            foreach (var arg in args)
             {
                 Preconditions.AtMost(arg.Value.Length, 10, nameof(args));
 

src/Discord.Net.WebSocket/Discord.Net.WebSocket.xml

@@ -2843,6 +2843,15 @@
                 voice regions the guild can access.
             </returns>
         </member>
+        <member name="M:Discord.WebSocket.SocketGuild.DeleteSlashCommandsAsync(Discord.RequestOptions)">
+            <summary>
+                Deletes all slash commands in the current guild.
+            </summary>
+            <param name="options">The options to be used when sending the request.</param>
+            <returns>
+                A task that represents the asynchronous delete operation.
+            </returns>
+        </member>
         <member name="M:Discord.WebSocket.SocketGuild.GetSlashCommandsAsync(Discord.RequestOptions)">
             <summary>
                 Gets a collection of slash commands created by the current user in this guild.

src/Discord.Net.WebSocket/Entities/Guilds/SocketGuild.cs

@@ -724,6 +724,16 @@ namespace Discord.WebSocket
             => GuildHelper.CreateIntegrationAsync(this, Discord, id, type, options);
 
         //Interactions
+        /// <summary>
+        ///     Deletes all slash commands in the current guild.
+        /// </summary>
+        /// <param name="options">The options to be used when sending the request.</param>
+        /// <returns>
+        ///     A task that represents the asynchronous delete operation.
+        /// </returns>
+        public Task DeleteSlashCommandsAsync(RequestOptions options = null)
+            => InteractionHelper.DeleteAllGuildCommandsAsync(Discord, this.Id, options);
+
         /// <summary>
         ///     Gets a collection of slash commands created by the current user in this guild.
         /// </summary>
@@ -823,7 +833,7 @@ namespace Discord.WebSocket
             if (_roles.TryGetValue(model.Id, out SocketRole role))
                 _roles[model.Id].Update(this.Discord.State, model);
             else
-               role = AddRole(model);
+                role = AddRole(model);
 
             return role;
         }
@@ -1289,7 +1299,7 @@ namespace Discord.WebSocket
         Task<IReadOnlyCollection<IVoiceChannel>> IGuild.GetVoiceChannelsAsync(CacheMode mode, RequestOptions options)
             => Task.FromResult<IReadOnlyCollection<IVoiceChannel>>(VoiceChannels);
         /// <inheritdoc />
-        Task<IReadOnlyCollection<ICategoryChannel>> IGuild.GetCategoriesAsync(CacheMode mode , RequestOptions options)
+        Task<IReadOnlyCollection<ICategoryChannel>> IGuild.GetCategoriesAsync(CacheMode mode, RequestOptions options)
             => Task.FromResult<IReadOnlyCollection<ICategoryChannel>>(CategoryChannels);
         /// <inheritdoc />
         Task<IVoiceChannel> IGuild.GetVoiceChannelAsync(ulong id, CacheMode mode, RequestOptions options)