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/README.md

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+# Mini-QR
+
+## Description
+
+**Mini-QR** is a lightweight, self-hosted web application for generating QR codes instantly and privately.  
+It provides a minimal and elegant interface to convert any text, URL, or message into a QR code — directly in your browser, without external tracking or dependencies.
+
+## Overview
+
+Mini-QR is designed for simplicity, privacy, and speed.  
+It offers an ad-free interface that works entirely within your local environment, making it ideal for individuals, organizations, and educational institutions that value data sovereignty.  
+The app runs as a single Docker container and requires no database or backend setup, enabling secure and frictionless QR generation anywhere.
+
+## Features
+
+- **Instant QR code creation** — simply type or paste your content.
+- **Privacy-friendly** — all generation happens client-side; no data leaves your server.
+- **Open Source** — fully auditable and modifiable for custom integrations.
+- **Responsive Design** — optimized for both desktop and mobile devices.
+- **Docker-ready** — can be deployed in seconds using the official image.
+
+## Further Resources
+
+- 🧩 Upstream project: [lyqht/mini-qr](https://github.com/lyqht/mini-qr)
+- 📦 Upstream Dockerfile: [View on GitHub](https://github.com/lyqht/mini-qr/blob/main/Dockerfile)
+- 🌐 Docker Image: `ghcr.io/lyqht/mini-qr:latest`