Feature request: Support patterns from external resources

[gwpl]

As example step number one and inspiration, imagine:

cat file | sgpt --pattern fabric:extract_wisdom

that would fetch (or use cached) pattern from https://github.com/danielmiessler/fabric/tree/main/patterns and use it.

Of course this could be extended in future to other providers.

(Maybe it's actually worth to be project by itself and be modular, sth like "pattern provider" from which tools like this one could get patterns/prompts etc...)

Cross-linking: charmbracelet/mods#235 (they are considering feature "role form URL/filepath")