feat: add Docker-based tool addons for dockge, komodo, dokploy, npmplus

Create addon scripts following the arcane.sh pattern for Docker-based
tools that can be installed on any existing Docker LXC:

- dockge: Docker Compose stack manager (port 5001)
- komodo: Build/deployment system with MongoDB/FerretDB (port 9120)
- dokploy: PaaS via external installer with Redis (port 3000)
- npmplus: Nginx Proxy Manager Plus via Compose (port 81)

Each addon includes:
- Docker availability check
- Install with full configuration
- Update via docker compose pull
- Uninstall with container cleanup
- ASCII header files

Original ct/ and install/ scripts are preserved for now.

tools/headers/dokploy

@@ -0,0 +1,6 @@
+    ____        __         __            
+   / __ \____  / /______  / /___  __  __ 
+  / / / / __ \/ //_/ __ \/ / __ \/ / / / 
+ / /_/ / /_/ / ,< / /_/ / / /_/ / /_/ /  
+/_____/\____/_/|_| .___/_/\____/\__, /   
+                /_/            /____/