Takeover of https://github.com/angular/angular/pull/66795 that fixes adev. Closes #66795.
This can break things in bazel
dev-app
This makes it easier to debug in production by including sourcemaps unconditionally. It also processes vendor sourcemaps (which includes Angular FW in this setup) and should improve debuggability of FW code by including sourcemap coverage.
Adds a dev app that can be used to prototype and debug things while developing Angular. Use `pnpm dev` to run it.