Added trigger

tests/ShaderPackageRegistryTests.cpp

@@ -64,7 +64,8 @@ void TestValidManifest()
 			{ "id": "mode", "label": "Mode", "type": "enum", "default": "soft", "options": [
 				{ "value": "soft", "label": "Soft" },
 				{ "value": "hard", "label": "Hard" }
-			] }
+			] },
+			{ "id": "flash", "label": "Flash", "type": "trigger" }
 		]
 	})");
 
@@ -76,8 +77,9 @@ void TestValidManifest()
 	Expect(package.textureAssets.size() == 1 && package.textureAssets[0].id == "maskTex", "texture assets parse");
 	Expect(package.fontAssets.size() == 1 && package.fontAssets[0].id == "inter", "font assets parse");
 	Expect(package.temporal.enabled && package.temporal.effectiveHistoryLength == 4, "temporal history is capped");
-	Expect(package.parameters.size() == 3, "parameters parse");
+	Expect(package.parameters.size() == 4, "parameters parse");
 	Expect(package.parameters[1].type == ShaderParameterType::Text && package.parameters[1].defaultTextValue == "LIVE", "text parameter parses");
+	Expect(package.parameters[3].type == ShaderParameterType::Trigger, "trigger parameter parses");
 
 	std::filesystem::remove_all(root);
 }