feat: Add support for editing application info and new fields

[Lumabots]

Introduces the AppInfo.edit coroutine to allow editing application settings. Updates AppInfo and related types to support new fields such as bot, flags, event webhooks, integration_types_config, and approximate_user_authorization_count. Also refactors type hints and improves handling of optional fields for better API compatibility.

Summary

Information

• [ ] This PR fixes an issue. #2454
• [ ] This PR adds something new (e.g. new method or parameters).
• [ ] This PR is a breaking change (e.g. methods or parameters removed/renamed).
• [ ] This PR is not a code change (e.g. documentation, README, typehinting, examples, ...).

Checklist

• [ ] I have searched the open pull requests for duplicates.
• [ ] If code changes were made then they have been tested.
  • [ ] I have updated the documentation to reflect the changes.
• [ ] If type: ignore comments were used, a comment is also left explaining why.
• [ ] I have updated the changelog to include these changes.

[pycord-app[bot]]

Thanks for opening this pull request! Please make sure you have read the Contributing Guidelines and Code of Conduct.

This pull request can be checked-out with:

git fetch origin pull/2994/head:pr-2994
git checkout pr-2994

This pull request can be installed with:

pip install git+https://github.com/Pycord-Development/pycord@refs/pull/2994/head

[Lumabots]

could we some review here ?

[Lumabots]

Im not home until Tuesday so feel free to edit it

[Paillat-dev]

No stress, this one is not urgent

[Paillat-dev]

cc @Lulalaby when you have time :)