✨ Add new role web-app-confluence

Introduced a new Ansible role for deploying Atlassian Confluence within the Infinito.Nexus ecosystem.
The role follows the same structure as web-app-pretix and includes:

- : Core variables, database config, OIDC integration.
- : Docker service definitions, features (Matomo, CSS, OIDC, logout, central DB).
- : Loads docker, db and proxy stack.
- : Placeholder for schema definitions.
- :
  -  (base for OIDC plugins/extensions),
  -  (service orchestration),
  -  (environment configuration).
- : Metadata, license, company, logo (Font Awesome book-open icon).

Canonical domain is set to `confluence.{{ PRIMARY_DOMAIN }}`.
This role ensures Confluence integrates seamlessly with Keycloak OIDC and the Infinito.Nexus service stack.

Conversation: https://chatgpt.com/share/68b1d006-bbd4-800f-9d2e-9c8a8af2c00f

roles/web-app-confluence/meta/main.yml

@@ -0,0 +1,21 @@
+---
+galaxy_info:
+  author: "Kevin Veen-Birkenbach"
+  description: "Confluence is an enterprise wiki and collaboration platform by Atlassian. This role deploys Confluence in Docker, adds support for OIDC authentication, and integrates with the Infinito.Nexus ecosystem."
+  license: "Infinito.Nexus NonCommercial License"
+  license_url: "https://s.infinito.nexus/license"
+  company: | 
+    Kevin Veen-Birkenbach
+    Consulting & Coaching Solutions
+    https://www.veen.world
+  galaxy_tags: []
+  repository: "https://s.infinito.nexus/code"
+  issue_tracker_url: "https://s.infinito.nexus/issues"
+  documentation: "https://s.infinito.nexus/code/"
+  logo:
+    class: "fas fa-book-open"
+  run_after:
+    - web-app-matomo
+    - web-app-keycloak
+    - web-app-mailu
+dependencies: []