ci/cd - generate custom calamares installer

[ErnWong]

• partitioning
• setup git, gh auth, ssh keys, gpg keys
• puts a copy of dotfiles git repo -
• sets up username and password from prompt
• Nixos-generate-config - generate hardware configuration and puts it under dotfiles/hosts and commits it and pushes it. Maybe instead of uuid filesystem mounts it instead uses disk by-label