feat(docs): generate API docs from source and export all public types and enums

## Summary by Sourcery

Automate API docs generation from the codebase and align documentation, type exports, and method groupings with the current Electrogram feature set.

New Features:
- Automatically discover and generate documentation pages for client methods, types, bound methods, and enums directly from the source tree.
- Introduce a dedicated Stories method group for story-related operations and expose it through the main methods namespace.
- Export all public Telegram types, including stories-related types, from the types package for easier importing.
- Generate API enum documentation pages and toctrees based on the enums library.

Enhancements:
- Refine the HTML theme configuration and custom CSS to use an indigo color scheme, improve readability, and better style links, code blocks, and tables.
- Simplify the users methods mixin by moving story-related methods into the new Stories group and cleaning up its composition.

Documentation:
- Add social links for GitHub and Telegram to the documentation theme header and update API reference structure for methods, types, bound methods, and enums to match the new generator.

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Signed-off-by: 5hojib <yesiamshojib@gmail.com>
Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

Author: Mehedi Hasan Shojib