Add support of llms.txt

[k3nsei]

I’d like to propose adding support for llms.txt to the NestJS documentation. This would help facilitate usage and indexing of the NestJS Docs by language models and AI systems. To help "AI" learn how to work with NestJS codebase.

Good example how to do it properly is Svelte project https://svelte.dev/docs/llms

[micalevisk]

do you know any resources that would help us to create and update those files easily?

[k3nsei]

@micalevisk as content is already stored as markdown documents. Maybe simplest thing would be to have dedicated url that is not serving html but this markdown content directly, maybe with some additional headers and links.

[serbanghita]

@micalevisk I'd suggest taking the approach of having best-practices.md file like in Angular https://angular.dev/ai/develop-with-ai It makes a huge difference to have that context fed directly into the LLM when you're working with files.