feat: Add RPG cog with character and inventory features

Sets up RPG system as a Redbot cog with core mechanics
Implements character creation, class selection, and stat management
Adds action commands for attacking and healing
Provides inventory and shop functionality for item management
Introduces interactive UI menus for user engagement

rpg/commands.py

@@ -0,0 +1,21 @@
+import discord
+from redbot.core import commands
+from .menu import RPGMenu
+
+class RPGCommands(commands.Cog):
+    """
+    Handles user commands (primarily menus) for the RPG system.
+    """
+
+    def __init__(self, rpg_cog, bot):
+        self.rpg_cog = rpg_cog
+        self.bot = bot
+        super().__init__()
+
+    @commands.command(name="menu")
+    async def menu_command(self, ctx):
+        """
+        Display the RPG menu.
+        """
+        view = RPGMenu(self.rpg_cog)
+        await ctx.send("Choose an action:", view=view)