Custom Sampling Pipelines

- Added a `Sample` method to `LLamaContext` which uses a custom pipeline
 - Modified all executors to use the custom pipeline if it exists

- Saves with serialized ChatHistory of session
- Only allows use of ChatHistory.Message (instead of raw text)
   for easy post-processing with IHistoryTransform implementation
- Provides History Management methods
- Allows user to regenerate last assistant message

Removed Obsolete ModelParams Constructor

FixedSizeQueue:
 - Enqueue would always stop one short of filling the capacity
 - Fill would only _replace_ existing items. It was only used in a place where there were not existing items! Removed the method entirely.

LLamaGrammarElement:
 - Converted into a `record` struct, removed all of the (now unnecessary) equality stuff.

Originally from these PRs:
 - https://github.com/SciSharp/LLamaSharp/pull/263
 - https://github.com/SciSharp/LLamaSharp/pull/259

MinP Sampler

- Cleaned up comments in implementations of `IInferenceParams`
 - Removed default values for all parameters in `LLamaContext.Sample` - they're never used and probably _shouldn't_ ever be used

This reverts commit 091b8d58b3502a99b3bfbec9db457c92cc736beb, reversing
changes made to 9b2ca9cf8e.

Multi GPU

- Replaced all binaries

- params contains a list of loras, instead of just one

Removed unused properties of `InferenceParams` & `ModelParams`

- Equality, hashing etc all implemented automatically
 - Default values are defined in just one place (the properties) instead of the constructor as well
 - Added test to ensure that serialization works properly

- Deleted `NativeInfo` (internal class, not used anywhere)

- Passing encoding in the `IModelParams`, which reduces how often encoding needs to be passed around

- Integrated grammar into sampling
 - Added a test for the grammar sampling