refactor(typing): import Callable from collections.abc; reduce usage of Any

[Enegg]

Summary

This PR:

• replaces from typing import Callable with from collections.abc import Callable
• simplifies Generator[T, None, None] to Generator[T]
• replaces Any with object where it's semantically equivalent

Checklist

• If code changes were made, then they have been tested
  • I have updated the documentation to reflect the changes
  • I have formatted the code properly by running uv run nox -s lint
  • I have type-checked the code by running uv run nox -s pyright
• This PR fixes an issue
• 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, ...)

[read-the-docs-community]

Documentation build overview

📚 disnake | 🛠️ Build #30027917 | 📁 Comparing 74e58c7 against latest (7c3b4f0)

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Show files changed (48 files in total): 📝 48 modified | ➕ 0 added | ➖ 0 deleted

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[onerandomusername]

Callable is (auto)fixed as a part of GH-1449

[Enegg]

Callable is (auto)fixed as a part of GH-1449

Oh, cool.