run as a service, read user config

[bambash]

I would be neat to run the binary as a service at startup, that watches a config file. This would remove the sudo requirements when running the binary, and give customization per user.

features:

• generate an example config
• generate a systemd service
• when running the binary, the config file updates

- region: <left | right | center | extra | all>
  color: <hex or string>
  pattern:
brightness:

example usage:

$ sys76-kb create config --values ....
writing example config to <path>

$ sys76-kb create service ....
creating systemd service <....>

$ sys76-kb service reload 
reloading sys76-kb service

## service side
$ sys76-kb watch <path>
watching <path>

## client side
$ sys76-kb set ....
updating config file