Add Arcane stack with auto-deployment and secret generation

- Added ARCANE_ENCRYPTION_KEY and ARCANE_JWT_SECRET to .env.example
- Created deploy_arcane() function in ez-homelab.sh
- Auto-generate Arcane secrets after Authelia secrets
- Deploy Arcane in both Option 2 (Core Server) and Option 3 (Additional Server)
- Added Arcane docker-compose.yml configuration

.env.example

@@ -74,6 +74,11 @@ AUTHELIA_JWT_SECRET=generate-with-openssl-rand-hex-64
 AUTHELIA_SESSION_SECRET=generate-with-openssl-rand-hex-64
 AUTHELIA_STORAGE_ENCRYPTION_KEY=generate-with-openssl-rand-hex-64
 
+# ARCANE Secrets - Let ez-homelab.sh generate these unless you know what your doing
+ARCANE_ENCRYPTION_KEY=generate-with-openssl-rand-hex-64
+ARCANE_JWT_SECRET=generate-with-openssl-rand-hex-64
+
+
 # Surfshark WireGuard (OPTIONAL - Advanced users only)
 # Get WireGuard details from Surfshark dashboard
 # SURFSHARK_PRIVATE_KEY=your-wireguard-private-key