feat: adapt to llama.cpp changes, repeat penalty, improved grammar

[giladgd]

Description of change

• Adapted to new llama.cpp interface
• Added support for repeat penalty
• Improved grammar support
• Added build toolchains for cross-compilation
• Moved context and evaluation options to LlamaContext, LlamaContext's evaluate function, and LlamaChatSession's prompt function while supporting the existing interface. This way the API is better aligned with llama.cpp while preserving compatibility with existing projects that use the old interface.

Fixes #57

Pull-Request Checklist

• Code is up-to-date with the master branch
• npm run format to apply eslint formatting
• npm run test passes with this change
• This pull request links relevant issues as Fixes #0000
• There are new or updated unit tests validating the change
• Documentation has been updated to reflect this change
• The new commits and pull request title follow conventions explained in CONTRIBUTING.md (PRs that do not follow this convention will not be merged)

[ido-pluto]

LGTM

[github-actions]

🎉 This PR is included in version 2.6.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release
• v2.6.0

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