Multiple bug fixes and improvements

[warelock2]

• Reverted back to Python 3.12, due to a known issue with Python 3.13 in Docker (This bot needs to stay with 3.12 for now):

Traceback (most recent call last): File "/app/discord_google_calendar_bot.py", line 45, in import discord File "/usr/local/lib/python3.13/site-packages/discord/init.py", line 23, in from .client import File "/usr/local/lib/python3.13/site-packages/discord/client.py", line 51, in from .sku import SKU, Entitlement File "/usr/local/lib/python3.13/site-packages/discord/sku.py", line 31, in from .app_commands import MissingApplicationID File "/usr/local/lib/python3.13/site-packages/discord/app_commands/init.py", line 12, in from .commands import File "/usr/local/lib/python3.13/site-packages/discord/app_commands/commands.py", line 53, in from .models import Choice File "/usr/local/lib/python3.13/site-packages/discord/app_commands/models.py", line 44, in from ..member import Member File "/usr/local/lib/python3.13/site-packages/discord/member.py", line 33, in import discord.abc File "/usr/local/lib/python3.13/site-packages/discord/abc.py", line 59, in from .voice_client import VoiceClient, VoiceProtocol File "/usr/local/lib/python3.13/site-packages/discord/voice_client.py", line 35, in from .player import AudioPlayer, AudioSource File "/usr/local/lib/python3.13/site-packages/discord/player.py", line 29, in import audioop ModuleNotFoundError: No module named 'audioop'

"Use of deprecated module audioop": https://github.com/Rapptz/discord.py/issues/9477

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• Have setup.sh wipe out the old .venv folder before creating it again from scratch - This helps with major upgrades of Python
• Unpinned the Python dependencies - This will help cope with random dependabot security pull requests
• Use python development dependencies (ie. black, pylint) if specified by requirements-dev.txt

[warelock2]

Closing and replacing with a new pull request