Add `llms.txt`

[Fidasek009]

An llms.txt file is a proposed web standard that acts as a structured map or "cheat sheet" for Large Language Models (LLMs) and AI agents. Placed in the root directory of a website, it highlights your most important content in plain Markdown, bypassing the clutter of HTML, JavaScript, and ads.

Note

Treat this more like a nice-to-have than something mandatory :)