GRM-16: test: add molecule lifecycle scenarios, integration tests, and docs

- Add multi-instance molecule scenario verifying isolated data/config dirs
- Add lifecycle molecule scenario testing stop/disable/enable/start sequence
- Update default and binary verify playbooks for template unit assertions
- Add integration tests for full CLI lifecycle and multi-instance support
- Add pytest integration marker and --no-cov Makefile target
- Update README with lifecycle commands, multi-instance examples, and architecture
- Update Makefile with start/stop/enable/disable/status/remove targets
- Update .env.example with GRM_LANG documentation

ansible/roles/gitea-runner/molecule/multi-instance/converge.yml

@@ -0,0 +1,22 @@
+---
+- name: Converge first runner instance
+  hosts: all
+  become: true
+  vars:
+    gitea_url: "http://localhost:3000"
+    registration_token: "fake-token-for-testing"
+    runner_name: "molecule-runner-a"
+    skip_runner_registration: true
+  roles:
+    - role: gitea-runner
+
+- name: Converge second runner instance
+  hosts: all
+  become: true
+  vars:
+    gitea_url: "http://localhost:3000"
+    registration_token: "fake-token-for-testing"
+    runner_name: "molecule-runner-b"
+    skip_runner_registration: true
+  roles:
+    - role: gitea-runner