fix(@angular-devkit/build-angular): only watch used files with application builder #26182
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When using the application builder in watch mode (including
ng serve
), the file watching will now only watch files used or relevant to the used files. Previously, all files within the project root were watched. This previous behavior could result in unneeded rebuilds when unrelated files were changed. An environment variable namedNG_BUILD_WATCH_ROOT
is also now available to enable the previous behavior in cases where it is still preferred as well as for testing and debugging purposes.