🐛 Small fixes and improvements

[pleonex]

Small fixes and improvements:

• Remove IsPublishable MSBuild property as it's not used.
• boolean arguments such as incremental or warn-as-error now accept a custom value to set it to false or true via CLI
  • Refactor extension method for arguments.
• Upgrade StyleCop to latest beta per author recommendation for latest C# support
• Removed Roslynator analyzer as it gives frequent errors with SDK upgrades.
• Clean-up old comments and markdown warnings

Checklist:

• Related code has been tested automatically or manually
• Related documentation is updated
• I acknowledge I have read and filled this checklist and accept the
  developer certificate of origin

Acceptance criteria

• It's possible to assign values to boolean arguments

Follow-up work

None

Example

Setting a command-line value for a boolean type: --incremental=False