Refactor rendering architecture and replace rasterizer with renderer

- Introduced SoftwareRenderer as a pixel-accurate software rendering backend.
- Removed the obsolete wolf_3d_rasterizer.dart file.
- Created a new wolf_3d_renderer.dart file to centralize rendering exports.
- Updated tests to accommodate the new rendering structure, including pushwall and projection sampling tests.
- Modified the WolfAsciiRenderer and WolfFlutterRenderer to utilize the new SoftwareRenderer.
- Enhanced enemy spawn tests to include new enemy states.

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

packages/wolf_3d_dart/test/entities/enemy_spawn_test.dart

@@ -40,6 +40,20 @@ void main() {
       expect(_spawnEnemy(140).angle, CardinalDirection.west.radians);
       expect(_spawnEnemy(141).angle, CardinalDirection.south.radians);
     });
+
+    test('spawns standing variants as ambushing', () {
+      expect(_spawnEnemy(134).state, EntityState.ambushing);
+      expect(_spawnEnemy(135).state, EntityState.ambushing);
+      expect(_spawnEnemy(136).state, EntityState.ambushing);
+      expect(_spawnEnemy(137).state, EntityState.ambushing);
+    });
+
+    test('spawns patrol variants as patrolling', () {
+      expect(_spawnEnemy(138).state, EntityState.patrolling);
+      expect(_spawnEnemy(139).state, EntityState.patrolling);
+      expect(_spawnEnemy(140).state, EntityState.patrolling);
+      expect(_spawnEnemy(141).state, EntityState.patrolling);
+    });
   });
 }