:recycle: refactor deprecated isRoomAvailable function

[schealex]

refactor deprecated isRoomAvailable function

Description:

replace deprecated function call

Fixed:

• closes #184 Deprication of isRoomAvailable
• closes #182 Upcoming deprecation: Game.map.isRoomAvailable causing console spam

Testing checklist:

• [x] Changes are backward-compatible OR version migration code is included
• [x] Codebase compiles with current tsconfig configuration
• [x] Tested changes on {PRIVATE} server

[schealex]

in addition there could be added caching since the new function also returns an expiration date but i wanted to fix the deprecated call first