Draft: Added VNCPassword definition

[goldenkirbi]

Added VNCPasswordFile definition for Linux and VNCPasswordRegistryValue for Windows.

Windows definition currently covers registry locations used by RealVNC and TightVNC.

Definitions for Darwin currently not implemented.

Closes #587

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (36fb328) 88.03% compared to head (9c10067) 88.03%.
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #588   +/-   ##
=======================================
  Coverage   88.03%   88.03%           
=======================================
  Files           7        7           
  Lines         443      443           
=======================================
  Hits          390      390           
  Misses         53       53           

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[joachimmetz]

@goldenkirbi is this ready for review? Looks like the YAML linter is flagging some issues

data/vnc.yaml
  9:7       error    wrong indentation: expected 4 but found 6  (indentation)
  26:28     error    trailing spaces  (trailing-spaces)
  [31](https://github.com/ForensicArtifacts/artifacts/actions/runs/6853173400/job/18692315988?pr=588#step:7:32):7      error    wrong indentation: expected 4 but found 6  (indentation)

[joachimmetz]

@goldenkirbi note this PR will be affected by #592