updates to documentation

[ryestew]

• [x] https://remix-ide.readthedocs.io/en/latest/index.html
• [ ] https://remix-ide.readthedocs.io/en/latest/compile.html#compilation-errors-and-warning
• [x] https://remix-ide.readthedocs.io/en/latest/settings.html
• [x] https://remix-ide.readthedocs.io/en/latest/community.html#community-support
• [ ] https://remix-ide.readthedocs.io/en/latest/plugin_list.html
• [ ] https://remix-ide.readthedocs.io/en/latest/code_contribution_guide.html
• [ ] https://remix-ide.readthedocs.io/en/latest/remix_commands.html
• [ ] TOC: advanced --> other name

New Pages

• [x] AI in Remix page
• [x] Vyper
• [ ] Circom

Remove pages

• [ ] truffle