chore: update package name and main class

Signed-off-by: Ryan Wang <i@ryanc.cc>

build.gradle

@@ -5,7 +5,7 @@ plugins {
     id "run.halo.plugin.devtools" version "0.0.5"
 }
 
-group 'run.halo.starter'
+group 'run.halo.appstore'
 sourceCompatibility = JavaVersion.VERSION_17
 
 repositories {

src/main/java/run/halo/appstore/AppStorePlugin.java

@@ -0,0 +1,21 @@
+package run.halo.appstore;
+
+import org.pf4j.PluginWrapper;
+import org.springframework.stereotype.Component;
+import run.halo.app.plugin.BasePlugin;
+
+@Component
+public class AppStorePlugin extends BasePlugin {
+
+    public AppStorePlugin(PluginWrapper wrapper) {
+        super(wrapper);
+    }
+
+    @Override
+    public void start() {
+    }
+
+    @Override
+    public void stop() {
+    }
+}