changes from the old version:

* removed ai-generated images from the "test chambers of the future" posters
* redid Cave Johnson's voice line using RVC, used uberduck previously
* removed old "Fennecai" logos and replaced them with "Map by blue"
* removed giant logos in the test chamber that some people thought were annoying
* fixed possibly corrupted elevator door model
* redid the test chamber diorama to look like my 90s test chamber style
* fixed a broken light