Get-RegistryPropertyValue: Add new command

[johlju]

Pull Request (PR) description

Added

• DscResource.Common
  • Added GitHub issue template for new command proposals.
  • Patch ModuleBuilder to workaround issue #135.
  • Public command:
    • Get-RegistryPropertyValue - Get a registry property value.

Changed

• Compare-DscParameterState
  • Updated comment-based help example.

This Pull Request (PR) fixes the following issues

• Fixes Get-RegistryPropertyValue: New command suggestion #139

Task list

• Added an entry to the change log under the Unreleased section of the
  file CHANGELOG.md. Entry should say what was changed and how that
  affects users (if applicable), and reference the issue being resolved
  (if applicable).
• Documentation added/updated in README.md.
• Comment-based help added/updated for all new/changed functions.
• Localization strings added/updated in all localization files as appropriate.
• Examples appropriately added/updated.
• Unit tests added/updated. See DSC Community Testing Guidelines.
• Integration tests added/updated (where possible). See
  DSC Community Testing Guidelines.
• New/changed code adheres to DSC Community Style Guidelines.

---

This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93%. Comparing base (8b170c8) to head (29cfebb).
Report is 5 commits behind head on main.

Additional details and impacted files

@@         Coverage Diff         @@
##           main   #141   +/-   ##
===================================
  Coverage    92%    93%           
===================================
  Files        41     42    +1     
  Lines       705    719   +14     
===================================
+ Hits        655    669   +14     
  Misses       50     50           

Files with missing lines	Coverage Δ
source/Public/Compare-DscParameterState.ps1	85% <ø> (ø)
source/Public/Get-RegistryPropertyValue.ps1	100% <100%> (ø)

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[johlju]

Reviewed 4 of 4 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @johlju)