Update docs to reflect new metric structure

[yosukehigashi]

#138 changed the structure a bit so the docs need to be updated.

Followed https://github.com/citadel-ai/langcheck/blob/main/docs/contributing.md#documentation and ran:

sphinx-apidoc -f --no-toc --separate --module-first -t docs/_templates/ -o docs src/langcheck/ src/langcheck/stats.py src/langcheck/metrics/model_manager

make -C docs clean html

[kennysong]

LGTM! We don't seem to define what "query based" means anywhere. I guess we can add it in a separate PR?

[yosukehigashi]

LGTM! We don't seem to define what "query based" means anywhere. I guess we can add it in a separate PR?

Ah I can add it in this one too - is adding a description to the Metric page what you had in mind?

[kennysong]

Yep, and also on the langcheck.metrics page. I highly suggest using this table formatting plugin to format the table properly!

[liwii]

Ping @yosukehigashi ... it's been here for a few months, aren't we gonna merge this?

[yosukehigashi]

Oh I forgot about this. I need to make some updates first - I'll do that today!

[kennysong]

LGTM!