Add the most important command aliases into the SetUpDatabases.cs

For convenience it would be nice if the bot has a few aliases hardcoded into it. Without this, every streamer who sets up the bot has to start anew and add aliases like !cmd for !commands, !hm for !hangman and other frequent abbreviations...

Start in SetUpDatabases.cs and inspect how command aliases are currently stored or initialized. Add the explicitly mentioned common aliases, including !cmd for !commands and !hm for !hangman, and confirm that the bot recognizes them when a new setup is created.

Written by the indexing model from the issue text.