implemented general help command and command specific help

cogs/music/main.py

@@ -0,0 +1,23 @@
+import discord
+from discord.ext import commands
+from discord.ext.commands.context import Context
+
+import datetime
+import pytz
+
+class music(commands.Cog):
+    def __init__(self, client):
+        self.name = "🎶 Music"
+        self.emoji = "🎶"
+        self.client = client
+
+    @commands.command(
+            help="Displays latency from the bot",
+            aliases=['delay'])
+    async def ping(self, e: Context):
+        start_time = datetime.datetime.now(pytz.utc)
+        end_time = e.message.created_at
+
+        delay = int((end_time - start_time).total_seconds() * 1000)
+
+        await e.send(f"Pong! `{delay}MS`")