Refactor ASCII rasterizer to support terminal ANSI mode and improve menu text rendering

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

apps/wolf_3d_cli/lib/cli_game_loop.dart

@@ -25,7 +25,9 @@ class CliGameLoop {
                'CliGameLoop requires a CliInput instance.',
              ),
 
-       primaryRasterizer = AsciiRasterizer(isTerminal: true),
+       primaryRasterizer = AsciiRasterizer(
+         mode: AsciiRasterizerMode.terminalAnsi,
+       ),
        secondaryRasterizer = SixelRasterizer() {
     _rasterizer = primaryRasterizer;
   }