[docs] API: use in marimo

[akshayka]

Thanks for the great library, and for supporting marimo (#638).

The API for marimo is missing from https://docs.kanaries.net/pygwalker/.

I realized this after someone shared Pygwalker on socials, but said they're not using it because they're using marimo — suggesting they didn't know that Pygwalker already supports marimo.

Would it be possible to add an API docs page for marimo?