tsconfig json files

• tsconfig.common.json - shared TypeScript options
• tsconfig.pkg2d.json - config for compiling rapier2d-compat
• tsconfig.pkg3d.json - config for compiling rapier3d-compat
• tconfig.json - for IDE (VSCode) and unit tests. Includes Jest types.

Generation steps

Check ./package.json scripts, which are used by CI.

Summary:

• build rust wasm projects into their dedicated folder in ./builds/
• copy common javascript and generate dimension specific javascript into a common ./pkg folder
• copy that pkg folder in each folder from ./builds