NoUI mode and Concurrency edits

[KamaleiZestri]

Type of Change

• New feature
• Bug fix
• Documentation update
• UI/UX improvement

Description

Following on from #4051, this PR adds the -noui run switch for winutil. When combined with -run and -config test.json, winutil will run all the tweaks,toggles,features, and installs listed in test.json without loading the UI.

Changes:

• Create Invoke-WPFUIThread.ps1 in order to add a guard clause preventing wpfform threads from running with -noui.
• Add -noui guard clause to Set-WinUtilProgressbar.ps1
• Add -noui guard clause to Invoke-WPFImpex.ps1
• Removed $DebugPreference from each call to Invoke-Runspace and instead set it once for the entire pool.
• Also pass -noui value into runspaces.
• Moved loop from Invoke-WinUtilFeatureInstall.ps1 to the caller Invoke-WPFFeatureInstall.ps1 to match with the tweaks equivalent.
• Moved some $sync.variables inside Invoke-Runspace scriptblocks.
• Move package manager preference load and applications config to load earlier in main.ps1, before UI.

[ChrisTitusTech]

Great PR, this also seemed to make the script launch a little faster as well.