fix(@angular-devkit/build-angular): ensure Sass load paths are resolv…

…ed from workspace root

When using the esbuild-based browser application builder, the Sass compiler will attempt to
resolve any relative load paths from the current working directory. However, the load paths
from the `angular.json` file should always be relative to the location of the `angular.json`
which is considered the workspace root. While the current working directory is typically
also the workspace root, it is not required nor always the same. To resolve this potential
mismatch, the load paths are now resolved from the workspace root prior to being passed to
the Sass compiler.

packages/angular_devkit/build_angular/src/builders/browser-esbuild/stylesheets.ts

@@ -47,7 +47,10 @@ export function createStylesheetBundleOptions(
     plugins: [
       createSassPlugin({
         sourcemap: !!options.sourcemap,
-        loadPaths: options.includePaths,
+        // Ensure Sass load paths are absolute based on the workspace root
+        loadPaths: options.includePaths?.map((includePath) =>
+          path.resolve(options.workspaceRoot, includePath),
+        ),
         inlineComponentData,
       }),
       createCssResourcePlugin(),