Angular: Support @boundary / @error error boundaries (#20015)

Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: fisker Cheung <lionkay@gmail.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
# Conflicts:
#	scripts/build/transform/index.js

tests/unit/__snapshots__/angular-blocks.js.snap

@@ -12,6 +12,7 @@ exports[`angular blocks 1`] = `
   "@defer",
   "@placeholder",
   "@loading",
+  "@boundary",
   "@error",
   "@content",
 ]