Update 3d model filenames

[JoanneLin168]

• Alex will make individual pbr textures with the same name as the rest of the files.
• Lucy will update the database to rename the column from objfilename to filename and remove the ".obj" at the end of every filename. Also will need to update the names to match the ones Alex has made, e.g. "feel_better.obj" should be renamed to "get-well-soon"
• Joanne will remove the switch statement that selects them and instead use the one retrieved from the database. She will also look into changing how audio is played, to get it from a file rather than via res/raw

[JoanneLin168]

A separate issue has been made for the pbr textures. Will close this now as the switch statement has been removed