Arrange ssh configs to subfolders. Base config store at _base file.

1. build.sh concat modules to ssh config file.
2. create.sh create new module structue.

Each module has a config file which contain ssh config.

Store ssh identity files in <module folder>/keys folder and use absolute path of those keys in config file.

If you need to temp skip modules from build process then can create a skip file inside of that module.

module/
├── keys/
│   └── id_ed25519
├── config
└── skip