feat: sync missing features from v0.49.x line to master

The v0.49.x tag line diverged from origin/master, leaving many
features only accessible via tags but not on the master branch.

New modules:
- ci/cancel_superseded_runs.py — cancel superseded CI runs
- ci/check_workflow_artifact_deps.py — validate artifact deps
- ci/check_workflow_tofu_init.py — validate tofu init steps
- tools/check_alert_rules.py — validate Prometheus alert rules
- tools/check_ansible_set_fact_to_json.py — lint set_fact usage
- tools/check_docker_init.py — validate Docker init scripts
- utils/jinja.py — Jinja2 template utilities
- utils/ui.py — UI/console utilities

Modified modules:
- distribute_molecule.py: add --include-roles/--exclude-roles
- utils/api.py: add container.credentials for private registry auth
- install_tools.py: retry ansible-galaxy on transient timeouts
- setup_image.py: skip dep resolution with --no-deps
- cli.py: register new commands
- i18n.py: add new translation keys

Also removes accidentally committed .vale/styles/Google/ files.

Test results: 2195 passed, 100% coverage.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

tests/unit/test_cli.py

@@ -40,6 +40,7 @@ class TestCliGroups:
         result = runner.invoke(cli, ["molecule", "--help"])
         assert result.exit_code == 0
         assert "distribute" in result.output
+        assert "guard" in result.output
         assert "all" in result.output
 
 
@@ -230,6 +231,13 @@ class TestMoleculeCommands:
         assert result.exit_code == 0
         mock_run.assert_called_once_with("devx.molecule.discover_runners", [])
 
+    @patch("devx.cli._run_module")
+    def test_molecule_guard(self, mock_run: MagicMock) -> None:
+        runner = CliRunner()
+        result = runner.invoke(cli, ["molecule", "guard"])
+        assert result.exit_code == 0
+        mock_run.assert_called_once_with("devx.molecule.molecule_ci_guard", [])
+
     @patch("devx.cli._run_module")
     def test_molecule_all(self, mock_run: MagicMock) -> None:
         runner = CliRunner()