Expand Pester coverage across install, tweaks, and UI workflows (#4792)

* Harden Pester CI and discard runspace return values

* Add prioritized test backlog

* Add WinUtil action logging

* Add config integrity tests

* Add XAML control wiring tests

* Add registry and service helper tests

* Add package manager tests

* Add runspace behavior tests

* Add tweak orchestration tests

* Add install workflow tests

* Add update profile tests

* Add AppX removal tests

* Log package installer output

* Add UI state helper tests

* Pin Pester test runner version

* Expand Win11 Creator tests

* Add preferences and theme tests

* Add search filter tests

* Add compile contract tests

* Use single WinUtil session log

* Remove installer output logging helper

* Handle locked WinUtil transcript log

* Avoid appending to active transcript log

* Log install uninstall package identities

.github/workflows/unittests.yaml

@@ -27,13 +27,16 @@ jobs:
     - name: Install Pester
       run: |
         Set-ExecutionPolicy -ExecutionPolicy Bypass -Scope Process
-        Install-Module -Name Pester -Force -SkipPublisherCheck -AllowClobber
+        Install-Module -Name Pester -RequiredVersion 5.8.0 -Force -SkipPublisherCheck -AllowClobber
+        Import-Module Pester -RequiredVersion 5.8.0 -Force
+        Get-Module Pester | Select-Object Name, Version, Path
       shell: pwsh
 
     - name: Run Pester tests
       run: |
         Set-ExecutionPolicy -ExecutionPolicy Bypass -Scope Process
-        Invoke-Pester -Path 'pester/*.Tests.ps1' -Output Detailed
+        Import-Module Pester -RequiredVersion 5.8.0 -Force
+        Invoke-Pester -Path 'pester/*.Tests.ps1' -Output Detailed -CI
 
       shell: pwsh
       env: