Add init system information to state output

[Itxaka]

so it can be checked in our yip config files easily:

kairos:
    flavor: ""
    version: 38 (Workstation Edition)
    init: systemd

[codecov]

Codecov Report

Merging #56 (fe82b33) into main (7d4292e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #56   +/-   ##
=======================================
  Coverage   46.59%   46.59%           
=======================================
  Files          12       12           
  Lines         880      880           
=======================================
  Hits          410      410           
  Misses        406      406           
  Partials       64       64           

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