feat: added jetpack ramp (blue one) and own area, contact callback and maskbits

lib/game/components/jetpack_ramp.dart

@@ -0,0 +1,74 @@
+import 'dart:math' as math;
+import 'package:flame/components.dart';
+import 'package:flame/extensions.dart';
+import 'package:flame_forge2d/flame_forge2d.dart';
+import 'package:pinball/game/game.dart';
+
+class JetpackRamp extends PositionComponent with HasGameRef<PinballGame> {
+  JetpackRamp({
+    required Vector2 position,
+  })  : _position = position,
+        super();
+
+  final Vector2 _position;
+
+  @override
+  Future<void> onLoad() async {
+    await add(
+      Pathway.arc(
+        color: Color.fromARGB(255, 8, 218, 241),
+        position: _position,
+        width: 80,
+        radius: 200,
+        angle: radians(210),
+        rotation: radians(-10),
+        maskBits: RampType.jetpack.maskBits,
+      ),
+    );
+
+    await add(
+      JetpackRampArea(
+        position: _position + Vector2(-10.5, 0),
+        rotation: radians(15),
+      ),
+    );
+    await add(
+      JetpackRampArea(
+        position: _position + Vector2(20.5, 3),
+        rotation: radians(-5),
+      ),
+    );
+
+    gameRef.addContactCallback(JetpackRampAreaCallback());
+  }
+}
+
+class JetpackRampArea extends RampArea {
+  JetpackRampArea({
+    required Vector2 position,
+    double rotation = 0,
+    int size = 7,
+  })  : _rotation = rotation,
+        _size = size,
+        super(
+          position: position,
+          maskBits: RampType.jetpack.maskBits,
+        );
+
+  final double _rotation;
+  final int _size;
+
+  @override
+  Shape get shape => PolygonShape()
+    ..set([
+      Vector2(-_size / 2, -.5)..rotate(_rotation),
+      Vector2(-_size / 2, .5)..rotate(_rotation),
+      Vector2(_size / 2, .5)..rotate(_rotation),
+      Vector2(_size / 2, -.5)..rotate(_rotation),
+    ]);
+}
+
+class JetpackRampAreaCallback extends RampAreaCallback<JetpackRampArea> {
+  @override
+  Set get ballsInside => <Ball>{};
+}