Added ConsoleBrowser2 and WebpageSnapshot demos

- Split the Lazarus demos directory into "Lazarus_Windows" and "Lazarus_Linux".
- Added OSRExternalPumpBrowser and TinyBrowser2 demos to "Lazarus_Linux".
- Set TBufferPanel.GetScreenScale as virtual.
- Added DevTools to the SchemeRegistrationBrowser demo.
- Modified the SchemeRegistrationBrowser demo to receive XMLHttpRequest requests from JavaScript.

demos/Lazarus_Windows/JavaScript/JSExtension/uSimpleTextViewer.pas

@@ -0,0 +1,33 @@
+unit uSimpleTextViewer;
+
+{$MODE Delphi}
+
+interface
+
+uses
+  {$IFDEF DELPHI16_UP}
+  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
+  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls;
+  {$ELSE}
+  LCLIntf, LCLType, LMessages, Messages, SysUtils, Variants, Classes, Graphics,
+  Controls, Forms, Dialogs, StdCtrls;
+  {$ENDIF}
+
+
+type
+  TSimpleTextViewerFrm = class(TForm)
+    Memo1: TMemo;
+  private
+    { Private declarations }
+  public
+    { Public declarations }
+  end;
+
+var
+  SimpleTextViewerFrm: TSimpleTextViewerFrm;
+
+implementation
+
+{$R *.lfm}
+
+end.