Adds new local models and updates documentation

[vishnuravi]

Adds new local models and updates documentation

⚙️ Release Notes

Adds support for running the following additional models, including those used in the SpeziLLM on-device benchmarking study:

• Llama3.1-Aloe-Beta-8B
• Llama3-Med42-8B
• Qwen2-7B-4bit
• DeepSeek-R1-Distill-Qwen-1.5B-8bit
• DeepSeek-R1-Distill-Qwen-7B-4bit
• DeepSeek-R1-Distill-Llama-8B-4bit-mlx

Updates documentation and README to reflect changes in the API.

📝 Code of Conduct & Contributing Guidelines

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[philippzagar]

Thanks @vishnuravi, let's see what these models can do! 🚀

[PSchmiedmayer]

Thank you @vishnuravi 🚀

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 13 lines in your changes missing coverage. Please review.

Project coverage is 39.12%. Comparing base (fe15019) to head (2535c21).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...es/SpeziLLMLocal/Configuration/LLMLocalModel.swift	0.00%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #97      +/-   ##
==========================================
+ Coverage   38.34%   39.12%   +0.79%     
==========================================
  Files          64       64              
  Lines        2345     2357      +12     
==========================================
+ Hits          899      922      +23     
+ Misses       1446     1435      -11     

Files with missing lines	Coverage Δ
...s/SpeziLLMLocalDownload/LLMLocalDownloadView.swift	0.00% <ø> (ø)
...es/SpeziLLMLocal/Configuration/LLMLocalModel.swift	0.00% <0.00%> (ø)

... and 2 files with indirect coverage changes

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[PSchmiedmayer]

Thank you for improving the documentation @vishnuravi!

I had some minor comments that should be all easily resolvable here or we create follow-up issues (e.g. Onboarding dependency).