chore: import upstream snapshot with attribution

packages/angular-rspack-compiler/patch/patch-angular-build.js

@@ -0,0 +1,28 @@
+const { readFileSync, renameSync } = require('fs');
+const { gte, coerce } = require('semver');
+const { dirname, join } = require('path');
+
+function main() {
+  const angularBuildPackageJson = require.resolve(
+    '@angular/build/package.json'
+  );
+  const fileContentsJson = JSON.parse(
+    readFileSync(angularBuildPackageJson, 'utf8')
+  );
+  if (gte(coerce(fileContentsJson.version), '20.2.0')) {
+    return;
+  }
+
+  const angularBuildDirectory = dirname(angularBuildPackageJson);
+  const angularBuildSrcDirectory = join(angularBuildDirectory, 'src');
+  renameSync(
+    join(__dirname, 'files', 'private.d.ts.txt'),
+    join(angularBuildSrcDirectory, 'private.d.ts')
+  );
+  renameSync(
+    join(__dirname, 'files', 'private.js.txt'),
+    join(angularBuildSrcDirectory, 'private.js')
+  );
+}
+
+main();