added type hints all over the project, updated mypy to ignore missing types from libraries

cogs/music/main.py

@@ -328,7 +328,7 @@ class music(commands.Cog):
         app_commands.Choice(name="Song", value="song"),
         app_commands.Choice(name="Queue", value="queue")
     ])
-    async def loop(self, ctx: Context, mode: str = None):
+    async def loop(self, ctx: Context, mode: str | None = None):
         """Toggle between loop modes or set a specific mode"""
         server = ctx.guild
 
@@ -391,7 +391,7 @@ class music(commands.Cog):
             description="Set playback volume",
             aliases=['vol', 'v'])
     @app_commands.describe(level="Volume level (0-200%, default shows current)")
-    async def volume(self, ctx: Context, level: int = None):
+    async def volume(self, ctx: Context, level: int | None = None):
         """Set or display the current volume"""
         server = ctx.guild
 
@@ -435,7 +435,7 @@ class music(commands.Cog):
             description="Apply audio effects to playback",
             aliases=['fx', 'filter'])
     @app_commands.describe(effect_name="The audio effect to apply (leave empty to see list)")
-    async def effect(self, ctx: Context, effect_name: str = None):
+    async def effect(self, ctx: Context, effect_name: str | None = None):
         """Apply or list audio effects"""
         server = ctx.guild