tsconfig.paths.json is nonstandard, and only used to get an accounting of:
- what package names map to what package paths
- how output paths map to source paths
Both of these are available elsewhere!
- package_name -> package paths: we can discover this by looking at package.json files during the source walk
- package/lib/foo -> packages/src/foo.ts mapping: we can look this up by resolving the "source' export condition from those package.Json files