Initial commit: nult - Ansible deployment toolkit

Merged from veridion-gitea and veridion-act-runner-gitea repos.

nult (Null-T) - instant teleportation from Strugatsky's Noon Universe.
Like Null-T, this toolkit instantly deploys infrastructure.

Roles:
- gitea: Gitea server with PostgreSQL (Docker Compose)
- act_runner: Gitea Actions runner

Playbooks:
- gitea.yml: Deploy Gitea server
- act-runner.yml: Deploy Act Runner
- site.yml: Deploy all services

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

site.yml

@@ -0,0 +1,23 @@
+---
+# =============================================================================
+# Site Playbook - Deploy All Services
+# =============================================================================
+#
+# Deploys all services in the correct order.
+#
+# Usage:
+#   ansible-playbook -i inventory/hosts.yml site.yml --ask-vault-pass
+#
+# Deploy specific service:
+#   ansible-playbook -i inventory/hosts.yml site.yml --tags gitea --ask-vault-pass
+#   ansible-playbook -i inventory/hosts.yml site.yml --tags act_runner --ask-vault-pass
+#
+# =============================================================================
+
+- name: Deploy Gitea
+  ansible.builtin.import_playbook: gitea.yml
+  tags: [gitea]
+
+- name: Deploy Act Runner
+  ansible.builtin.import_playbook: act-runner.yml
+  tags: [act_runner]