chore(observer): add RemoteHookObserver and IssueWorker classes #259

Introduce RemoteHookObserver to handle remote hook events and IssueWorker for processing tasks. Both classes are placeholders for future implementation.

Author: phodal

core/src/main/kotlin/cc/unitmesh/devti/observer/RemoteHookObserver.kt

@@ -0,0 +1,24 @@
+package cc.unitmesh.devti.observer
+
+import cc.unitmesh.devti.observer.agent.AgentProcessor
+import cc.unitmesh.devti.provider.observer.AgentObserver
+import com.intellij.openapi.project.Project
+
+/**
+ * Remote Hook observer will receive the remote hook event and process it.
+ * like:
+ * - [ ] Jira issue
+ * - [ ] GitHub/Gitlab issue
+ * and Trigger after processor, and send the notification to the chat window.
+ */
+class RemoteHookObserver : AgentObserver {
+    override fun onRegister(project: Project) {
+//        TODO("Not yet implemented")
+    }
+}
+
+class IssueWorker : AgentProcessor {
+    override fun process() {
+//        TODO("Not yet implemented")
+    }
+}