refactor: extract userbot to standalone repo, add as git submodule

userbot now lives at ssh://git@gitssh.forust.xyz:2221/forust/userbot.git
and is included in homelab as a submodule at userbot/

userbot/modules/durov.py

@@ -1,16 +0,0 @@
-from random import randint
-
-from pyrogram import Client, enums, filters
-from pyrogram.types import Message
-from utils.misc import modules_help, prefix
-
-
-@Client.on_message(filters.command('durov', prefix) & filters.me)
-async def durov(_, message: Message):
-    await message.edit(
-        f'<b>Random post from channel: https://t.me/durov/{randint(21, 36500)}</b>',  # noqa: S311
-        parse_mode=enums.ParseMode.HTML,
-    )
-
-
-modules_help['durov'] = {'durov': 'Send random post from durov channel'}