Fixed ASCII rasterizer, abstracted out input and audio, and created CLI client (untested)

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

packages/wolf_3d_flutter/lib/wolf_3d_input_flutter.dart

@@ -0,0 +1,38 @@
+import 'package:flutter/services.dart';
+import 'package:wolf_3d_entities/wolf_3d_entities.dart';
+import 'package:wolf_3d_input/wolf_3d_input.dart';
+
+class Wolf3dFlutterInput extends Wolf3dInput {
+  Set<LogicalKeyboardKey> _previousKeys = {};
+
+  @override
+  void update() {
+    final pressedKeys = HardwareKeyboard.instance.logicalKeysPressed;
+    final newlyPressedKeys = pressedKeys.difference(_previousKeys);
+
+    isMovingForward = pressedKeys.contains(LogicalKeyboardKey.keyW);
+    isMovingBackward = pressedKeys.contains(LogicalKeyboardKey.keyS);
+    isTurningLeft = pressedKeys.contains(LogicalKeyboardKey.keyA);
+    isTurningRight = pressedKeys.contains(LogicalKeyboardKey.keyD);
+
+    isInteracting = newlyPressedKeys.contains(LogicalKeyboardKey.space);
+
+    isFiring =
+        pressedKeys.contains(LogicalKeyboardKey.controlLeft) &&
+        !pressedKeys.contains(LogicalKeyboardKey.space);
+
+    requestedWeapon = null;
+    for (final LogicalKeyboardKey key in newlyPressedKeys) {
+      if (key == LogicalKeyboardKey.digit1) requestedWeapon = WeaponType.knife;
+      if (key == LogicalKeyboardKey.digit2) requestedWeapon = WeaponType.pistol;
+      if (key == LogicalKeyboardKey.digit3) {
+        requestedWeapon = WeaponType.machineGun;
+      }
+      if (key == LogicalKeyboardKey.digit4) {
+        requestedWeapon = WeaponType.chainGun;
+      }
+    }
+
+    _previousKeys = Set.from(pressedKeys);
+  }
+}