[Languages] Cleanup language constants, use repositories (#3838)

* [Languages] Cleanup languages constants

# Notes
- Cleanup formatting and logic where necessary.
- Cleaned up constants to use a namespace with `constexpr` instead.
- Changed `LoadCharacterLanguages` to use a repository instead.

* Lua GroupMessage uint8/language_id

* Lua More uint8/language_id

zone/lua_general.cpp

@@ -3789,7 +3789,7 @@ std::string lua_get_faction_name(int faction_id) {
 	return quest_manager.getfactionname(faction_id);
 }
 
-std::string lua_get_language_name(int language_id) {
+std::string lua_get_language_name(uint8 language_id) {
 	return quest_manager.getlanguagename(language_id);
 }