allow simplifying command registry to just a string arg for the pattern

ubot/modules/system.py

@@ -10,7 +10,7 @@ from ubot.micro_bot import micro_bot
 ldr = micro_bot.loader
 
 
-@ldr.add(pattern="reload", sudo=True)
+@ldr.add("reload", sudo=True)
 async def reload_modules(event):
     reload_msg = await event.reply("`Reloading modules…`")
 
@@ -25,14 +25,14 @@ async def reload_modules(event):
             pass
 
 
-@ldr.add(pattern="del")
+@ldr.add("del")
 async def delete_message(event):
     message_to_delete = await event.get_reply_message()
     if message_to_delete.from_id == (await event.client.get_me()).id:
         await message_to_delete.delete()
 
 
-@ldr.add(pattern="alive", sudo=True)
+@ldr.add("alive", sudo=True)
 async def alive(event):
     alive_format = "`μBot is running under {0}.\n\n" \
                    "Version: {1}\n" \
@@ -42,13 +42,13 @@ async def alive(event):
     await event.reply(alive_format.format(uname().node, ldr.botversion, version.__version__, python_version()))
 
 
-@ldr.add(pattern="shutdown", sudo=True)
+@ldr.add("shutdown", sudo=True)
 async def shutdown(event):
     await event.reply("`Goodbye…`")
     await micro_bot.stop_client()
 
 
-@ldr.add(pattern="ping")
+@ldr.add("ping")
 async def ping(event):
     start = time_ns()
     ping_msg = await event.reply("`Ping…`")
@@ -56,6 +56,6 @@ async def ping(event):
     await ping_msg.edit(f"`Ping… Pong! -> `**{time_taken_ms}**`ms`")
 
 
-@ldr.add(pattern="repo")
+@ldr.add("repo")
 async def bot_repo(event):
     await event.reply("https://github.com/Nick80835/microbot")