hotfix: Fix plugin initialization error

- Add CodeXPStartupActivity to call init block in CodeXPService
- Add CodeXPStartupActivity as PostStartupActivity in plugin.xml

Author: ByteAurora

src/main/kotlin/com/github/ilovegamecoding/intellijcodexp/activities/CodeXPStartupActivity.kt

@@ -0,0 +1,14 @@
+package com.github.ilovegamecoding.intellijcodexp.activities
+
+import com.github.ilovegamecoding.intellijcodexp.services.CodeXPService
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.openapi.diagnostic.thisLogger
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.startup.StartupActivity
+
+class CodeXPStartupActivity : StartupActivity {
+    override fun runActivity(project: Project) {
+        thisLogger().warn("CodeXPStartupActivity.runActivity")
+        val codeXPService = ApplicationManager.getApplication().getService(CodeXPService::class.java)
+    }
+}

src/main/resources/META-INF/plugin.xml

@@ -9,6 +9,8 @@
     <resource-bundle>messages.CodeXPBundle</resource-bundle>
 
     <extensions defaultExtensionNs="com.intellij">
+        <postStartupActivity
+                implementation="com.github.ilovegamecoding.intellijcodexp.activities.CodeXPStartupActivity"/>
         <toolWindow factoryClass="com.github.ilovegamecoding.intellijcodexp.toolWindow.CodeXPToolWindowFactory"
                     anchor="right"
                     id="CodeXP Dashboard" icon="icons/toolWindowIcon.svg"/>
@@ -18,9 +20,6 @@
                                  instance="com.github.ilovegamecoding.intellijcodexp.toolWindow.CodeXPConfigurable"/>
     </extensions>
 
-    <application-components>
-    </application-components>
-
     <applicationListeners>
         <listener class="com.github.ilovegamecoding.intellijcodexp.listeners.CodeXPEventListener"
                   topic="com.intellij.openapi.actionSystem.ex.AnActionListener"/>