feat: ✨ Update to support python 3.14

[Paillat-dev]

Summary

Depends on: #2645
The above pull request is required as it refactors asyncio usage in a way that does not make use of deprecated methods. See: https://docs.python.org/3.14/whatsnew/3.14.html#deprecated

⚠️ This requires testing.

Information

• 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, 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]

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/2948/head:pr-2948
git checkout pr-2948

This pull request can be installed with:

pip install git+https://github.com/Pycord-Development/pycord@refs/pull/2948/head

[NeloBlivion]

Does this require anything beyond #2645?

[Lulalaby]

Drafting

[Paillat-dev]

Does this require anything beyond #2645?

Maybe stuff related to voice idk

[Lulalaby]

I put that on hold for the next release

[Copilot]

Pull Request Overview

This PR adds support for Python 3.14 by updating version constraints, classifiers, CI configurations, and documentation across the project.

• Updated Python version support from <3.14 to <3.15 in project configuration
• Added Python 3.14 to CI/CD workflows for testing and releases
• Updated documentation to reflect new version support

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pyproject.toml	Updated requires-python constraint to include 3.14, added 3.14 classifier, and added py314 to Black target versions
README.rst	Updated documentation to indicate Python 3.14 support
CHANGELOG.md	Added changelog entry documenting Python 3.14 support
.github/workflows/release.yml	Updated release workflow to use Python 3.14
.github/workflows/lib-checks.yml	Added Python 3.14 to test matrix and updated linting jobs to use 3.14

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Paillat-dev]

w/out #2645:

Traceback (most recent call last):
  File "/home/paillat/Documents/pycord/pycord/test_simple.py", line 11, in <module>
    bot = discord.Bot()
  File "/home/paillat/Documents/pycord/pycord/discord/bot.py", line 1171, in __init__
    super().__init__(*args, **options)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "/home/paillat/Documents/pycord/pycord/discord/bot.py", line 97, in __init__
    super().__init__(*args, **kwargs)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/home/paillat/Documents/pycord/pycord/discord/cog.py", line 646, in __init__
    super().__init__(*args, **kwargs)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/home/paillat/Documents/pycord/pycord/discord/client.py", line 250, in __init__
    asyncio.get_event_loop() if loop is None else loop
    ~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/paillat/.local/share/uv/python/cpython-3.14.0-linux-x86_64-gnu/lib/python3.14/asyncio/events.py", line 715, in get_event_loop
    raise RuntimeError('There is no current event loop in thread %r.'
                       % threading.current_thread().name)
RuntimeError: There is no current event loop in thread 'MainThread'.

w/ #2645:

INFO:discord.client:logging in using static token
INFO:discord.gateway:Shard ID None has sent the IDENTIFY payload.
INFO:discord.gateway:Shard ID None has connected to Gateway: ["gateway-prd-arm-us-east1-b-gdz6",{"micros":439333,"calls":["id_created",{"micros":606,"calls":[]},"session_lookup_time",{"micros":3594,"calls":[]},"session_lookup_finished",{"micros":11,"calls":[]},"discord-sessions-prd-2-124",{"micros":434230,"calls":["start_session",{"micros":419304,"calls":["discord-api-rpc-75d66748db-ltmwx",{"micros":410441,"calls":["get_user",{"micros":10603},"get_guilds",{"micros":28160},"send_scheduled_deletion_message",{"micros":16},"guild_join_requests",{"micros":32431},"authorized_ip_coro",{"micros":14},"pending_payments",{"micros":692},"apex_experiments",{"micros":5},"user_activities",{"micros":3},"played_application_ids",{"micros":3},"linked_users",{"micros":2}]}]},"starting_guild_connect",{"micros":77,"calls":[]},"presence_started",{"micros":644,"calls":[]},"guilds_started",{"micros":105,"calls":[]},"lobbies_started",{"micros":1,"calls":[]},"guilds_connect",{"micros":1,"calls":[]},"presence_connect",{"micros":14069,"calls":[]},"connect_finished",{"micros":14077,"calls":[]},"build_ready",{"micros":19,"calls":[]},"clean_ready",{"micros":1,"calls":[]},"optimize_ready",{"micros":0,"calls":[]},"split_ready",{"micros":1,"calls":[]}]}]}] (Session ID: fe1af9de6dacae0ee1ec47e85604b190).
Logged in as Test BOT 2#7657 (ID: 1175074550820634714)
------

Test Code

import discord
import os
from dotenv import load_dotenv
import logging

logging.basicConfig(level=logging.INFO)

load_dotenv()

bot = discord.Bot()


class MyCog(discord.Cog):
    @discord.Cog.listener()
    async def on_ready(self):
        print(f"Logged in as {bot.user} (ID: {bot.user.id})")
        print("------")


bot.add_cog(MyCog())

bot.run(os.getenv("TOKEN_2"))

CC @Lulalaby

[Lulalaby]

gotcha