add directional light component and skylight component, add PCSS and hard shadow

Editor/assets/scenes/FPSDemo.scene

@@ -1,6 +1,6 @@
 Scene: Scene Name
 Environment:
-  AssetPath: assets/env/pink_sunrise_4k.hdr
+  AssetPath: assets\env\birchwood_4k.hdr
   Light:
     Direction: [-0.787, -0.733, 1]
     Radiance: [1, 1, 1]
@@ -51,6 +51,7 @@ Entities:
       Bounciness: 0.1
     MeshColliderComponent:
       AssetPath: assets/meshes/Capsule.fbx
+      IsConvex: true
       IsTrigger: false
   - Entity: 11149966982516343187
     TagComponent:
@@ -79,6 +80,7 @@ Entities:
       Bounciness: 0.1
     MeshColliderComponent:
       AssetPath: assets/meshes/Sphere1m.fbx
+      IsConvex: true
       IsTrigger: false
   - Entity: 10169503531257462571
     TagComponent:
@@ -176,6 +178,17 @@ Entities:
       Offset: [0, 0, 0]
       Size: [1, 1, 1]
       IsTrigger: false
+  - Entity: 2025484417758554619
+    TagComponent:
+      Tag: Sky Light
+    TransformComponent:
+      Position: [0, 0, 0]
+      Rotation: [0, 0, 0]
+      Scale: [1, 1, 1]
+    SkyLightComponent:
+      EnvironmentAssetPath: assets\env\birchwood_4k.hdr
+      Intensity: 1
+      Angle: 0
 PhysicsLayers:
   - Name: Box
     CollidesWith: