Reorganize repo: one folder per application under apps/.

Move docker/ and configs/ into apps/<name>/ with config/ subfolders.
Proxmox split into hosts/pve and hosts/dell-proxmox. Nginx under
infrastructure/. Update sync script, RESTORE.md, and per-app READMEs.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/homelab-command/README.md

@@ -0,0 +1,15 @@
+# Homelab Command
+
+Applicatiecode en monitoring-build staan in een aparte repo:
+
+- **Gitea:** http://192.168.1.211:3000/mo/homelab-command
+- **NAS-pad:** `/volume1/homes/mo/homelab-command`
+
+```bash
+git clone http://192.168.1.211:3000/mo/homelab-command.git /volume1/homes/mo/homelab-command
+cd /volume1/homes/mo/homelab-command
+cp .env.example .env   # vul in
+docker compose -f docker-compose.homelab.yml up -d --build
+```
+
+Zie ook `apps/monitoring/` in homelab-configs voor Prometheus/Grafana compose.