Remove "paths" from tsconfig.json everywhere

[anthonyshew]

"paths" in package.json isn't actually meant for us to use: https://twitter.com/atcb/status/1691208437349462016

Instead, we should be using package.json#imports: https://nodejs.org/api/packages.html#subpath-imports

The problem is that, currently, VSCode does not recognize package.jsonimports. Code will compile just fine but VSCode will be quite upset.

Until that issue is closed, we will use BOTH the "paths" and "package.json#imports". This will allow us to:

• Have an editor that is happy.
• Use subpaths in packages.

Hate doubling up on these configs but it will be easy to remove once the issue is closed!