docs: initial architecture, roadmap, readme for ntfy-bridge

- README.md: project overview, quickstart, sources summary
- ARCHITECTURE.md: complete architecture, data flow, project structure
- ROADMAP.md: 5-phase development plan (v0.1.0 → v0.5.0+)
- CONTRIBUTING.md: dev setup, conventions, how to add a source
- ntfy-bridge.example.yaml: fully documented configuration template
- scripts/example-cron-disk.sh: example cron script → ntfy-bridge

scripts/example-cron-disk.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+# example-cron-disk.sh
+# Exemple de script cron qui envoie un résumé d'espace disque vers ntfy-bridge.
+# À appeler depuis cron : 0 9 * * * /path/to/example-cron-disk.sh
+
+NTFY_BRIDGE_URL="${NTFY_BRIDGE_URL:-http://127.0.0.1:9090}"
+WEBHOOK_PATH="${WEBHOOK_PATH:-/webhooks/cron-disk}"
+
+# Collecter l'info disque
+DISK_INFO=$(df -h / /mnt/nfs /home 2>/dev/null | tail -n +2 | awk '{print "  " $6 ": " $3 "/" $2 " (" $5 " used)"}')
+
+# Construire le message
+MESSAGE="💾 **Disk Usage Report** — $(date '+%Y-%m-%d %H:%M')
+${DISK_INFO}
+
+Warnings (>80%):
+$(df -h / /mnt/nfs /home 2>/dev/null | awk 'NR>1 {gsub(/%/,"",$5); if ($5+0 > 80) print "  ⚠️  " $6 " is at " $5 "%"}' || echo "  ✅ All partitions under 80%")"
+
+# Envoyer vers ntfy-bridge
+curl -s -X POST \
+  -H "Content-Type: text/plain" \
+  -d "$MESSAGE" \
+  "${NTFY_BRIDGE_URL}${WEBHOOK_PATH}" > /dev/null
+
+echo "Disk report sent to ntfy-bridge"