* - Added `NativeLogConfig` which allows overriding the llama.cpp log callback
- Delaying binding of this into llama.cpp until after `NativeLibraryConfig` has loaded
* Using the log callback to show loading log messages during loading.
* Registering log callbacks before any calls to llama.cpp except `llama_empty_call`, this is specifically selected to be a method that does nothing and is just there for triggering DLL loading.
* - Removed much of the complexity of logging from `NativeApi.Load`. It always call whatever log callbacks you have registered.
- Removed alternative path for `ILogger` in NativeLibraryConfig, instead it redirects to wrapping it in a delegate.
* Saving a GC handle to keep the log callback alive
* Removed prefix, logger should already do that.
* Buffering up messages until a newline is encountered before passing log message to ILogger.
* - Added trailing `\n` to log messages from loading.
- Using `ThreadLocal<StringBuilder>` to ensure messages from separate threads don't get mixed together.
- Modified library loading to be based on `SetDllImportResolver`. This replaces the built in loading system and ensures there can't be two libraries loaded at once.
- llava and llama are loaded separately, as needed.
- All the previous loading logic is still used, within the `SetDllImportResolver`
- Split out CUDA, AVX and MacOS paths to separate helper methods.
- `Description` now specifies if it is for `llama` or `llava`
- Made `NativeApi` into a `static class` (it's not intended to be instantiated)
- Moved `LLamaTokenType` enum out into a separate file
- Made `LLamaSeqId` and `LLamaPos` into `record struct`, convenient to have equality etc
- Enabled more features in build process (VBMI and VNNI)
- Added runtime checking for this features
- Improved runtime checking to no longer require dotnet8.0
- using `Lazy<T>` to initialize it automatically.
- Added in `AVX512` support for all dotnet versions (but not autodetected).
- Added in AVX version auto detection.