phone number widget (#1228)

* phone number widget

* material phone number input

* correct attr

* set packagemanager field

* missing deps

* no deps implementation

* libphonenumber-js

* libphonenumber-js

* remove unused settings

* country autocomplete, examples

Author: gugu

CLAUDE.md

@@ -0,0 +1,8 @@
+# Claude Code Configuration
+
+## Frontend Tests
+
+To run frontend tests:
+```bash
+cd frontend && yarn test --browsers=ChromeHeadlessCustom --no-watch --no-progress
+```