Implemented lavalink for bot + cog

bot.py

@@ -11,9 +11,13 @@ from discord.ext.commands.errors import (
     ExtensionNotFound,
     NoEntryPointError,
 )
+import lavalink
 
 
 class ChristmasBot(commands.Bot):
+    lavalink: lavalink.Client
+    invite_link: str
+
     def __init__(self, config: Dict[Any, Any]):
         intents = discord.Intents(
             voice_states=True, guild_messages=True, guilds=True, messages=True
@@ -23,8 +27,6 @@ class ChristmasBot(commands.Bot):
         self.initial_cog_names: List[str] = self.config.get("cogs", [])
         self.colors: Dict[str, Color] = self.process_colours(config.get("colors", []))
 
-        self.invite_link: str = ""
-
         super().__init__(
             command_prefix=self.prefix_callable,
             description=self.config["info"].get("description", ""),