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

Scripts/CLI/Show-CliLastUsedSettings.ps1

@@ -0,0 +1,20 @@
+# Shows the CLI last used settings from LastUsedSettings.json file, displays pending changes and prompts the user to apply them.
+function Show-CliLastUsedSettings {
+    Write-CliHeader 'Custom Mode'
+
+    try {
+        Import-Settings -filePath $script:SavedSettingsFilePath -expectedVersion "1.0"
+    }
+    catch {
+        Write-Error "Failed to load settings from LastUsedSettings.json file: $_"
+        Wait-ForKeyPress
+    }
+
+    if ($Silent) {
+        # Skip change summary and confirmation prompt
+        return
+    }
+
+    Write-PendingChanges
+    Write-CliHeader 'Custom Mode'
+}