feat(javascript): add FrontendFlow and DsComponent interfaces #81

- Added `FrontendFlow` interface to handle the flow of frontend tasks in JavaScript projects.
- Added methods to `FrontendFlow` interface to get routes, components, design system components, sample remote call, and sample state management.
- Added `DsComponent` data class to represent design system components in JavaScript projects.

javascript/src/main/kotlin/cc/unitmesh/ide/javascript/flow/DsComponent.kt

@@ -0,0 +1,10 @@
+package cc.unitmesh.ide.javascript.flow
+
+/**
+ * the Design System Component
+ */
+data class DsComponent(
+    val name: String,
+    val props: List<String>,
+    val events: List<String>
+)

javascript/src/main/kotlin/cc/unitmesh/ide/javascript/flow/FrontendFlow.kt

@@ -0,0 +1,45 @@
+package cc.unitmesh.ide.javascript.flow
+
+import cc.unitmesh.devti.flow.TaskFlow
+
+/**
+ *
+ * 1. Finding Function bootstrap, like the main function in java, ReactDom.render in React
+ * 2. IO Handing
+ * 3. Transform data, like State in React, Vuex in Vue
+ * 4. Processing calling, like the fetch in React, the axios in Vue
+ * 5. Output Transform, like the render in React, the template in Vue
+ */
+interface FrontendFlow : TaskFlow<String> {
+    var userTask: String
+
+    /**
+     * Get all routes in the project, including the routes in the submodules
+     * @return list of routes
+     */
+    fun getRoutes(): List<String>
+
+    /**
+     * Get all components in the project, based on the naming convention, like the PascalCase under `src/components`
+     * @return list of components
+     */
+    fun getComponents(): List<DsComponent>
+
+    /**
+     * Get the design system components, like the Ant Design in React, the Element in Vue
+     * @return list of design system components
+     */
+    fun getDesignSystemComponents(): List<DsComponent>
+
+    /**
+     * Get remote call as a sample, like the axios in Vue, the fetch in React
+     * @return list of services
+     */
+    fun sampleRemoteCall(): String
+
+    /**
+     * Get the state management, like the Vuex in Vue, the Redux in React, maybe Empty
+     * @return list of state management
+     */
+    fun sampleStateManagement(): String?
+}