docs: Add a quickstart guide for Llama

[chmjkb]

Description

As discussed internally, adding a quickstart with running LLMs to the README - #17

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (improves or adds clarity to existing documentation)

Tested on

• iOS
• Android

Testing instructions

Screenshots

Related issues

Checklist

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation accordingly
• My changes generate no new warnings

Additional notes

[NorbertKlockiewicz]

I think the video is missing.

[chmjkb]

I think the video is missing.

fixed