Refactor: Cleanup app removal, remove legacy app list generator and CustomAppsList file support (#662)

* remove support for uninstalling old sunset apps

* Add color legend on app removal screen

* Remove legacy app list generator and custom apps file support
Replaced by GUI config export/import, dynamic RemovalMethod, and
CLI app removal settings saved to LastUsedSettings.json.

* Verify app removal by checking actual installation state instead of trusting winget output

Scripts/Features/InvokeChanges.ps1

@@ -20,10 +20,12 @@ function Invoke-FeatureApply {
     if ($script:Features.ContainsKey($FeatureId)) {
         $feature = $script:Features[$FeatureId]
     }
+    
+    $applyText = if ($feature -and $feature.ApplyText) { $feature.ApplyText } else { $FeatureId }
 
     # ---- Registry-backed features: import .reg file, then handle side effects ----
-    if ($feature -and $feature.RegistryKey -and $feature.ApplyText) {
-        ImportRegistryFile "> $($feature.ApplyText)..." $feature.RegistryKey
+    if ($feature -and $feature.RegistryKey) {
+        ImportRegistryFile "> $applyText..." $feature.RegistryKey
 
         # Post-import side effects for specific features
         switch ($FeatureId) {
@@ -32,8 +34,8 @@ function Invoke-FeatureApply {
                 RemoveApps @('Microsoft.BingSearch')
             }
             'DisableCopilot' {
-                # Also remove the app package for Copilot
-                RemoveApps @('Microsoft.Copilot')
+                # Also remove the app packages for Copilot
+                RemoveApps @('Microsoft.Copilot', 'XP9CXNGPPJ97XX')
             }
             'DisableTelemetry' {
                 # Also disable telemetry scheduled tasks
@@ -44,8 +46,6 @@ function Invoke-FeatureApply {
     }
 
     # ---- Custom features (no registry backing, or special handling required) ----
-    # Resolve a safe apply-text fallback in case the feature is missing from Features.json
-    $applyText = if ($feature -and $feature.ApplyText) { $feature.ApplyText } else { $FeatureId }
     switch ($FeatureId) {
         'RemoveApps' {
             Write-Host "> $applyText for $(GetFriendlyTargetUserName)..."
@@ -61,20 +61,6 @@ function Invoke-FeatureApply {
             RemoveApps $appsList
             return
         }
-        'RemoveAppsCustom' {
-            Write-Host "> $applyText..."
-            $appsList = LoadAppsFromFile $script:CustomAppsListFilePath
-
-            if ($appsList.Count -eq 0) {
-                Write-Host "No valid apps were selected for removal" -ForegroundColor Yellow
-                Write-Host ""
-                return
-            }
-
-            Write-Host "$($appsList.Count) apps selected for removal"
-            RemoveApps $appsList
-            return
-        }
         'RemoveGamingApps' {
             $appsList = @('Microsoft.GamingApp', 'Microsoft.XboxGameOverlay', 'Microsoft.XboxGamingOverlay')
             Write-Host "> $applyText..."