Refactor cogs and update author formatting

Updated `__init__.py` to import specific cog classes
and added asynchronous `setup` functions for each.
Modified `info.json` to improve the formatting of the
"author" field for better readability.

hiring/__init__.py

@@ -1,4 +1,4 @@
-from .hiring import setup
+from .hiring import Hiring
 
-# This function is required for the cog to be loaded by Red.
-# It simply imports the setup function from the main cog file.
+async def setup(bot):
+    await bot.add_cog(Hiring(bot))