:sparkles: GUI Kairos YAML configurator

[jimmykarily]

This splits step 2 from here: https://github.com/kairos-io/kairos/issues/772

Acceptance Criteria

• There is a binary (new or existing one) that shows a GUI (web based or not)
• The GUI allows the user to create a Kairos config file by clicking on GUI elements
• For the first iteration only the basic options should be implemented
• The result should be a yaml snippet which the user can copy and use to install Kairos
• The kairos yaml schema validator should be used in the project's test suite. This should be the single point of truth, whenever we validate yamls (webui, user provided, whatever).
• There is a test suite for the UI

[jimmykarily]

Extracted the validator here: https://github.com/orgs/kairos-io/projects/1/views/1?pane=issue&itemId=19231235