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

This reverts commit 3c383db9a7.

userbot/modules/calculator.py

@@ -0,0 +1,39 @@
+import asyncio
+
+from pyrogram import Client, filters
+from pyrogram.types import Message
+from utils.misc import modules_help, prefix
+
+
+@Client.on_message(filters.command('calc', prefix) & filters.me)
+async def calc(_, message: Message):
+    if len(message.command) <= 1:
+        return
+    args = ' '.join(message.command[1:])
+    try:
+        result = str(eval(args))  # noqa: S307
+
+        if len(result) > 4096:
+            for i, x in enumerate(range(0, len(result), 4096)):
+                if i == 0:
+                    await message.edit(
+                        f'<i>{args}</i><b>=</b><code>{result[x : x + 4000]}</code>',
+                        parse_mode='HTML',
+                    )
+                else:
+                    await message.reply(f'<code>{result[x : x + 4096]}</code>', parse_mode='HTML')
+                await asyncio.sleep(0.18)
+        else:
+            await message.edit(f'<i>{args}</i><b>=</b><code>{result}</code>', parse_mode='HTML')
+    except Exception as e:
+        await message.edit(f'<i>{args}=</i><b>=</b><code>{e}</code>', parse_mode='HTML')
+
+
+modules_help['calculator'] = {
+    'calc [expression]*': 'solve a math problem\n'
+    '+ – addition\n'
+    '– – subtraction\n'
+    '* – multiplication\n'
+    '/ – division\n'
+    '** – degree'
+}