[fxcop] Fixes for Wox.Plugin (1of3) (#7457)

* Added CultureInfo (CA1307: Specify StringComparison for clarity / CA1304: Specify CultureInfo)

* Check arguments and throw ArgumentNullException (CA1062: Validate arguments of public methods)

* Changed url parameter from string to System.Uri and added null checks (CA1054: URI parameters should not be strings)

* Rethrow exception without specifying the exception explicitly (CA2200: Rethrow to preserve stack details)

* Changed from Collection property to methods for PluginMetadata::ActionKeywords (CA2227: Collection properties should be read only)

* Changed from Collection property to methods for Result::GetTitleHighlightData (CA2227: Collection properties should be read only)

* Made Collection property read-only and added parameter in constructor for Result::SubTitleHighlightData (CA2227: Collection properties should be read only)

* Made Collection property read only and added parameter in constructor for ResultUpdatedEventArgs::Results (CA2227: Collection properties should be read only)

* CA1507: Use nameof in place of string

* Removed initialization for ThemeManager::_disposed (CA1805: Do not initialize unnecessarily)

* Changed Query::Terms array property to ReadOnlyCollection and added private set (CA1819: Properties should not return arrays)

* CA1060: Move P/Invokes to NativeMethods class

* CA1806: Do not ignore method results

* CA2101: Specify marshaling for P/Invoke string arguments

* Removed unnecessary empty interface IFeatures (CA1040: Avoid empty interfaces)

- Removed IFeatures interface and references
- Renamed IFeatures.cs to IContextMenu.cs according to guidelines

* Added comments for CultureInfo (CA1307: Specify StringComparison for clarity / CA1304: Specify CultureInfo)

* Added localization for Wox.Plugin and localized strings in FilesFolders.cs

src/modules/launcher/Wox.Plugin/SharedCommands/ShellCommand.cs

@@ -4,7 +4,6 @@
 
 using System;
 using System.Diagnostics;
-using System.Runtime.InteropServices;
 using System.Text;
 using System.Threading;
 
@@ -14,19 +13,15 @@ namespace Wox.Plugin.SharedCommands
     {
         public delegate bool EnumThreadDelegate(IntPtr hwnd, IntPtr lParam);
 
-        [DllImport("user32.dll")]
-        private static extern bool EnumThreadWindows(uint threadId, EnumThreadDelegate lpfn, IntPtr lParam);
-
-        [DllImport("user32.dll")]
-        private static extern int GetWindowText(IntPtr hwnd, StringBuilder lpString, int nMaxCount);
-
-        [DllImport("user32.dll")]
-        private static extern int GetWindowTextLength(IntPtr hwnd);
-
         private static bool containsSecurityWindow;
 
         public static Process RunAsDifferentUser(ProcessStartInfo processStartInfo)
         {
+            if (processStartInfo == null)
+            {
+                throw new ArgumentNullException(nameof(processStartInfo));
+            }
+
             processStartInfo.Verb = "RunAsUser";
             var process = Process.Start(processStartInfo);
 
@@ -55,7 +50,7 @@ namespace Wox.Plugin.SharedCommands
             ProcessThreadCollection ptc = Process.GetCurrentProcess().Threads;
             for (int i = 0; i < ptc.Count; i++)
             {
-                EnumThreadWindows((uint)ptc[i].Id, CheckSecurityThread, IntPtr.Zero);
+                NativeMethods.EnumThreadWindows((uint)ptc[i].Id, CheckSecurityThread, IntPtr.Zero);
             }
         }
 
@@ -71,8 +66,8 @@ namespace Wox.Plugin.SharedCommands
 
         private static string GetWindowTitle(IntPtr hwnd)
         {
-            StringBuilder sb = new StringBuilder(GetWindowTextLength(hwnd) + 1);
-            GetWindowText(hwnd, sb, sb.Capacity);
+            StringBuilder sb = new StringBuilder(NativeMethods.GetWindowTextLength(hwnd) + 1);
+            _ = NativeMethods.GetWindowText(hwnd, sb, sb.Capacity);
             return sb.ToString();
         }