chore: Codebase cleanup after going python 3.10+

[Lulalaby]

Depends on #2948

This basically just runs pyupgrade --py310-plus on the codebase.

[pycord-app]

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This pull request can be checked-out with:

git fetch origin pull/2988/head:pr-2988
git checkout pr-2988

This pull request can be installed with:

pip install git+https://github.com/Pycord-Development/pycord@refs/pull/2988/head

[Copilot]

Pull Request Overview

This PR modernizes the codebase by migrating from typing_extensions to the standard typing module for features that are now available in Python 3.10+. Since the project requires Python >= 3.10, these imports can be safely moved to the standard library. Additionally, the PR updates the event loop initialization in the Client class to avoid deprecation warnings in Python 3.11+.

Key changes:

• Migrated TypedDict, ParamSpec, Concatenate, TypeGuard, Literal, Annotated, get_args, and get_origin from typing_extensions to typing
• Removed Python 3.10 version checks and related code paths that are no longer needed
• Updated event loop initialization to use asyncio.get_running_loop() with fallback to asyncio.new_event_loop() to avoid deprecation warnings

Reviewed Changes

Copilot reviewed 29 out of 29 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
discord/utils.py	Migrated ParamSpec import; removed sys import, PY_310 version check, and Python < 3.10 code path for literal flattening
discord/types/*.py	Migrated TypedDict from typing_extensions to typing across multiple type definition files
discord/ext/commands/core.py	Migrated Concatenate, ParamSpec, and TypeGuard imports
discord/ext/commands/context.py	Migrated ParamSpec import
discord/commands/core.py	Removed sys import and Python 3.11 version check; migrated Annotated, Literal, get_args, get_origin, Concatenate, and ParamSpec imports
discord/commands/context.py	Migrated ParamSpec import and consolidated imports on single line
discord/client.py	Updated event loop initialization to avoid asyncio.get_event_loop() deprecation warning
discord/_version.py	Migrated TypedDict import

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[Copilot]

@Lulalaby I've opened a new pull request, #2989, to work on those changes. Once the pull request is ready, I'll request review from you.

[Lulalaby]

i still hate you pre-commit