feat(melonx): cog with transfer command and help integration

Introduces a new 'melonx' cog with a dropdown help menu and a 'transfer' command for save file migration instructions. Updates help command categories and README to include MeloNX. Implements UI components for command selection and embeds for user guidance.

cogs/melonx/__init__.py

@@ -0,0 +1,73 @@
+import discord
+from discord import app_commands
+from discord.ext import commands
+from discord.ext.commands import Context
+
+from .melonx import MelonxView
+from .transfer import transfer_command
+
+class Melonx(commands.GroupCog, name="melonx"):
+    def __init__(self, bot) -> None:
+        self.bot = bot
+        super().__init__()
+
+    @commands.group(name="melonx", invoke_without_command=True)
+    async def melonx_group(self, context: Context):
+        embed = discord.Embed(
+            title="MeloNX Commands",
+            description="Choose a command from the dropdown below to get help with specific issues:",
+            color=0x963155
+        )
+        embed.set_author(name="MeloNX", icon_url="https://yes.nighty.works/raw/TLGaVa.png")
+        view = MelonxView(self.bot)
+        await context.send(embed=embed, view=view)
+
+    @melonx_group.command(name="help")
+    async def melonx_group_help(self, context: Context):
+        embed = discord.Embed(
+            title="MeloNX Commands",
+            description="Choose a command from the dropdown below to get help with specific issues:",
+            color=0x963155
+        )
+        embed.set_author(name="MeloNX", icon_url="https://yes.nighty.works/raw/TLGaVa.png")
+        view = MelonxView(self.bot)
+        await context.send(embed=embed, view=view)
+
+    @melonx_group.command(name="transfer")
+    async def melonx_group_transfer(self, context: Context):
+        await self._invoke_hybrid(context, "transfer")
+
+    async def _invoke_hybrid(self, context: Context, name: str):
+        command = self.bot.get_command(name)
+        if command is not None:
+            await context.invoke(command)
+        else:
+            await context.send(f"Unknown MeloNX command: {name}")
+
+    @app_commands.command(
+        name="help",
+        description="MeloNX troubleshooting help"
+    )
+    async def help(self, interaction: discord.Interaction):
+        embed = discord.Embed(
+            title="MeloNX Commands",
+            description="Choose a command from the dropdown below to get help with specific issues:",
+            color=0x963155
+        )
+        embed.set_author(name="MeloNX", icon_url="https://yes.nighty.works/raw/TLGaVa.png")
+        view = MelonxView(self.bot)
+        await interaction.response.send_message(embed=embed, view=view, ephemeral=True)
+
+    @commands.hybrid_command(
+        name="transfer",
+        description="How to transfer save files from other emulators or platforms"
+    )
+    async def transfer(self, context):
+        return await transfer_command()(self, context)
+
+async def setup(bot) -> None:
+    cog = Melonx(bot)
+    await bot.add_cog(cog)
+    
+    bot.logger.info("Loaded extension 'melonx.help'")
+    bot.logger.info("Loaded extension 'melonx.transfer'")