Add comprehensive test suite, fix minor issues, rename function and file names to match approved verbs (#708)

Scripts/Run-Tests.ps1

@@ -0,0 +1,49 @@
+<#
+    .SYNOPSIS
+        Runs the Win11Debloat Pester test suite locally.
+
+    .PARAMETER Bootstrap
+        Installs a compatible Pester 5 release for the current user when Pester is
+        not already available.
+#>
+[CmdletBinding()]
+param(
+    [switch]$Bootstrap
+)
+
+$ErrorActionPreference = 'Stop'
+$repositoryRoot = Split-Path -Parent $PSScriptRoot
+$testPath = Join-Path $repositoryRoot 'Tests'
+
+if (-not (Get-Module -ListAvailable -Name Pester | Where-Object { $_.Version.Major -eq 5 })) {
+    if (-not $Bootstrap) {
+        Write-Error 'Pester 5 is required. Install it with: .\Scripts\Run-Tests.ps1 -Bootstrap'
+        exit 1
+    }
+
+    try {
+        [Net.ServicePointManager]::SecurityProtocol = [Net.ServicePointManager]::SecurityProtocol -bor [Net.SecurityProtocolType]::Tls12
+
+        if (-not (Get-PackageProvider -Name NuGet -ListAvailable -ErrorAction SilentlyContinue)) {
+            Install-PackageProvider -Name NuGet -MinimumVersion 2.8.5.201 -Scope CurrentUser -Force -Confirm:$false | Out-Null
+        }
+
+        Install-Module -Name Pester -RequiredVersion 5.9.0 -Scope CurrentUser -Force -AllowClobber -Confirm:$false
+    }
+    catch {
+        Write-Error "Unable to install Pester 5: $($_.Exception.Message)"
+        exit 1
+    }
+
+    if (-not (Get-Module -ListAvailable -Name Pester | Where-Object { $_.Version.Major -eq 5 })) {
+        Write-Error 'Pester 5 was not installed. Update PowerShellGet or install Pester 5 manually, then run the tests again.'
+        exit 1
+    }
+}
+
+Import-Module Pester -MinimumVersion 5.0.0 -MaximumVersion 5.999.999 -Force
+$result = Invoke-Pester -Path $testPath -Output Detailed -PassThru
+
+if ($result.Result -ne 'Passed' -or $result.FailedContainersCount -gt 0 -or $result.TotalCount -eq 0) {
+    exit 1
+}