Add gist FS

[martindurant]

We have a github implementation, which I find surprisingly convenient. We should also do one for gists, which also have a reasonable API https://docs.github.com/en/rest/reference/gists . We could mirror the github implementation and require user/gist_id, or only require user and auto list their gists (which have hex-like IDs, not sensible names). I tend towards the latter.
Within a gist you only have a single flat list of files.

"https://api.github.com/users/martindurant/gists" lists my gists, AND the files within each of them, giving size and URL to the raw download. The call can be optionally paginated.

[martindurant]

(yes, you could view this as unnecessary, since you can always get the URL for a file in a given gist from the web interface)

[lmmx]

This would be great and would allow downstream projects like Universal Pathlib to support it with minimal extra code.

I've recently used UPath to make octopolars, remarkably simply!

I don't view this as unnecessary, it's a very reasonable extension from GitHub and would showcase the fsspec stable nicely.

[lmmx]

I implemented it! :-)

import fsspec

gist_id = "c6ed259a32957069b4a39bf9e40becae"
print("Gist ID:", gist_id)
fs = fsspec.filesystem("gist", gist_id=gist_id)
file_list = fs.ls("")
print("Files in the Gist (via fsspec):", file_list)

(filesystem_spec) louis 🌟 ~/dev/filesystem_spec $ python ~/lab/fsspec/gist.py 
Gist ID: c6ed259a32957069b4a39bf9e40becae
Files in the Gist (via fsspec): ['1-cad.md', '2-cad.md', '3-cad.md', '4-cad.md', '5-cad.md']