Add new web-app-mini-qr role

- Introduced new role 'web-app-mini-qr' to deploy the lightweight, self-hosted Mini-QR application.
- Added dedicated subnet and localhost port mapping (8059) in group_vars.
- Ensured proper dependency structure and run_once handling in MIG role.
- Included upstream reference and CSP whitelist for temporary clarity.ms removal tracking.
- Added README.md and meta information following the Infinito.Nexus web-app schema.

See: https://chatgpt.com/share/68f890ab-5960-800f-85f8-ba30bd4350fe

roles/web-app-mini-qr/templates/docker-compose.yml.j2

@@ -0,0 +1,12 @@
+---
+{% include 'roles/docker-compose/templates/base.yml.j2' %}
+{% set container_port = 8080 %}  
+  {{ application_id | get_entity_name }}:
+{% include 'roles/docker-container/templates/base.yml.j2' %}
+    image: "{{ MINI_QR_IMAGE }}:{{ MINI_QR_VERSION }}"
+    container_name: "{{ MINI_QR_CONTAINER }}"
+    ports:
+      - 127.0.0.1:{{ ports.localhost.http[application_id] }}:{{ container_port }}
+{% include 'roles/docker-container/templates/networks.yml.j2' %}
+
+{% include 'roles/docker-compose/templates/networks.yml.j2' %}