Adds hassbian manager script

[ludeeus]

Description:

This adds a "Hassbian manager" web tool to manage hassbian-config suites.

Checklist (Required):

• The code change is tested and works locally.
• The code is compliant with Contributing guidelines

If pertinent:

• Script has validation check of the job.
• Created/Updated documentation at /docs

[Landrash]

Looks good to me and ok to merge when you consider it finished.

[ludeeus]

Since this and #238 have the same base, I'll hold off to see if I can include auth here to

[ghost]

When it will be implemented ?

[ludeeus]

First it needs to be done, then pass a second review, then be merged, then wait for a new version containing this.

[ludeeus]

Should be good now, @Landrash want to have another look? :)