refactor: workload, port and secret according to the new appConfig model

the way of using namespace isn't changed and marked it as a todo

pkg/apis/core/v1/appconfiguration.go

@@ -0,0 +1,81 @@
+package v1
+
+import (
+	"kusionstack.io/kusion/pkg/apis/core/v1/workload"
+)
+
+type Accessory map[string]interface{}
+
+// AppConfiguration is a developer-centric definition that describes how to run an App. The application model is built on a decade
+// of experience from AntGroup in operating a large-scale internal developer platform and combines the best ideas and practices from the
+// community.
+//
+// Note: AppConfiguration per se is not a Kusion Module
+//
+// Example:
+// import models.schema.v1 as ac
+// import models.schema.v1.workload as wl
+// import models.schema.v1.workload.container as c
+// import models.schema.v1.workload.container.probe as p
+// import models.schema.v1.monitoring as m
+// import models.schema.v1.database as d
+//
+//		helloWorld: ac.AppConfiguration {
+//		   # Built-in module
+//		   workload: wl.Service {
+//		       containers: {
+//		           "main": c.Container {
+//		               image: "ghcr.io/kusion-stack/samples/helloworld:latest"
+//		               # Configure a HTTP readiness probe
+//		               readinessProbe: p.Probe {
+//		                   probeHandler: p.Http {
+//		                       url: "http://localhost:80"
+//		                   }
+//		               }
+//		           }
+//		       }
+//		   }
+//
+//		   # extend accessories module base
+//	    accessories: {
+//	       # Built-in module, key represents the module source
+//	       "kusionstack/mysql@v0.1" : d.MySQL {
+//	           type: "cloud"
+//	           version: "8.0"
+//	       }
+//	       # Built-in module, key represents the module source
+//	       "kusionstack/prometheus@v0.1" : m.Prometheus {
+//	           path: "/metrics"
+//	       }
+//	       # Customized module, key represents the module source
+//	       "foo/customize": customizedModule {
+//	               ...
+//	       }
+//	   }
+//
+//		   # extend pipeline module base
+//		   pipeline: {
+//		       # Step is a module
+//		       "step" : Step {
+//		           use: "exec"
+//		           args: ["--test-all"]
+//		       }
+//		   }
+//
+//		   # Dependent app list
+//		   dependency: {
+//		       dependentApps: ["init-kusion"]
+//		   }
+//		}
+type AppConfiguration struct {
+	// Name of the target App.
+	Name string `json:"name,omitempty" yaml:"name,omitempty"`
+	// Workload defines how to run your application code.
+	Workload *workload.Workload `json:"workload" yaml:"workload"`
+	// Accessories defines a collection of accessories that will be attached to the workload.
+	// The key in this map represents the module source. e.g. kusionstack/mysql@v0.1
+	Accessories map[string]*Accessory `json:"accessories,omitempty" yaml:"accessories,omitempty"`
+	// Labels and Annotations can be used to attach arbitrary metadata as key-value pairs to resources.
+	Labels      map[string]string `json:"labels,omitempty" yaml:"labels,omitempty"`
+	Annotations map[string]string `json:"annotations,omitempty" yaml:"annotations,omitempty"`
+}