chore: update Examples (#196)

* test: add unit tests for AppCheck token creation and verification

* test: add unit tests for OIDC and SAML provider config operations

* test: add unit tests for Firestore terminate method

* test: add unit tests for ConditionMessage handling in messaging

* test: add unit tests for experimental URI handling in task queue

* chore: update examples

* feat: add temporary user creation and cleanup in auth example

* chore: update examples

Author: demolaf