Add ChatPhraseFilter & mod optimizations (1.20)

NEW
ChatPhraseFilter is a filter that removes messages that matches regex from a list in lobby. You can create your own powerful regex at https://regex101.com/
Add to the filter by doing /poinpow chat_phrase_filter add "regex"
Thank you nicco1690 for your suggestion.
(if you have any issues please report them to me on discord or github)

other stuff
Regex is now stored in classes instead of being recompiled every time. (gstudiosx suggestion)
BlockLobbyWelcome now checks for if it's in lobby (bruh)