feat : add shader pack rule and filter rule

Assets/YooAsset/Editor/AssetBundleCollector/DefaultRules/DefaultFilterRule.cs

@@ -70,6 +70,15 @@ namespace YooAsset.Editor
         }
     }
    
+    [DisplayName("收集着色器")]
+    public class CollectShader : IFilterRule
+    {
+        public bool IsCollectAsset(FilterRuleData data)
+        {
+            return Path.GetExtension(data.AssetPath) == ".shader";
+        }
+    }
+
     [DisplayName("收集着色器变种集合")]
     public class CollectShaderVariants : IFilterRule
     {

Assets/YooAsset/Editor/AssetBundleCollector/DefaultRules/DefaultPackRule.cs

@@ -147,6 +147,18 @@ namespace YooAsset.Editor
         }
     }
 
+    /// <summary>
+    /// 打包着色器
+    /// </summary>
+    [DisplayName("打包着色器文件")]
+    public class PackShader : IPackRule
+    {
+        public PackRuleResult GetPackRuleResult(PackRuleData data)
+        {
+            return DefaultPackRule.CreateShadersPackRuleResult();
+        }
+    }
+
     /// <summary>
     /// 打包着色器变种集合
     /// </summary>