refactor: moderation cogs && update embed styling

Removed template copyright headers from moderation cogs and database files. Improved embed styling and consistency in purge and warnings commands, including unified colors, author fields, and permission checks. Added a helper for sending embeds in warnings cog and replaced decorator-based permission checks with manual checks for better feedback. Updated comments in database files.

cogs/moderation/purge.py

@@ -1,11 +1,3 @@
-"""
-Copyright © Krypton 2019-Present - https://github.com/kkrypt0nn (https://krypton.ninja)
-Description:
-🐍 A simple template to start to code your own and personalized Discord bot in Python
-
-Version: 6.4.0
-"""
-
 import discord
 from discord import app_commands
 from discord.ext import commands
@@ -33,9 +25,11 @@ class Purge(commands.Cog, name="purge"):
         await context.send("Deleting messages...")
         purged_messages = await context.channel.purge(limit=amount + 1)
         embed = discord.Embed(
+            title="Purge",
             description=f"**{context.author}** cleared **{len(purged_messages)-1}** messages!",
-            color=0xBEBEFE,
+            color=0x7289DA,
         )
+        embed.set_author(name="Moderation", icon_url="https://yes.nighty.works/raw/8VLDcg.webp")
         await context.channel.send(embed=embed)