[Addon kubevela#603] Add Apache Spark as a experimental addon

Signed-off-by: yanghua <yanghua1127@gmail.com>

experimental/addons/spark-kubernetes-operator/definitions/spark-cluster.cue

@@ -8,18 +8,29 @@
 
 template: {
 	parameter: {
-        // +usage=Specify the spark application name
+		// +usage=Specify the spark application name
 		name: string
-        // +usage=Specify the namespace for spark application to install
+		// +usage=Specify the namespace for spark application to install
  		namespace: string
+		// +usage=Specify the application language type, e.g. "Scala", "Python", "Java" or "R"
 		type: string
+		// +usage=Specify the python version 
+		pythonVersion: string
+		// +usage=Specify the deploy mode, e.go "cluster", "client" or "in-cluster-client"
 		mode: string
+		// +usage=Specify the container image for the driver, executor, and init-container
 		image: string
+		// +usage=Specify the image pull policy for the driver, executor, and init-container
 		imagePullPolicy: string
+		// +usage=Specify the fully-qualified main class of the Spark application
 		mainClass: string
+		// +usage=Specify the path to a bundled JAR, Python, or R file of the application
 		mainApplicationFile: string
+		// +usage=Specify the version of Spark the application uses
 		sparkVersion: string
+		// +usage=Specify the number of CPU cores to request for the driver pod
 		driverCores: int
+		// +usage=Specify the number of CPU cores to request for the executor pod
 		executorCores: int
 	}
 
@@ -45,23 +56,23 @@ template: {
 		    kind: "SparkApplication"
                     apiVersion: "sparkoperator.k8s.io/v1beta2"
 		    metadata: {
-			    name: 	   parameter.name
-			    namespace: parameter.namespace
+			name: 	   parameter.name
+			namespace: parameter.namespace
 		    }
 		    spec: {
-			    type: parameter.type
-			    mode: parameter.mode
-			    image: parameter.image
-			    imagePullPolicy: parameter.imagePullPolicy
-			    mainClass: parameter.mainClass
-			    mainApplicationFile: parameter.mainApplicationFile
-			    sparkVersion: parameter.sparkVersion
-			    driver: {
-			        cores: parameter.driverCores
-			    }
-			    executor: {
-			        cores: parameter.executorCores	
-			    }
+			type: parameter.type
+			mode: parameter.mode
+			image: parameter.image
+			imagePullPolicy: parameter.imagePullPolicy
+			mainClass: parameter.mainClass
+			mainApplicationFile: parameter.mainApplicationFile
+			sparkVersion: parameter.sparkVersion
+			driver: {
+			    cores: parameter.driverCores
+			}
+			executor: {
+			    cores: parameter.executorCores	
+			}
 		    }
 		}