add configureable demo

Author: 892768447

src/main/kotlin/irony/pycharm/qsseditor/QSSConfigurable.kt

@@ -0,0 +1,15 @@
+package irony.pycharm.qsseditor
+
+import com.intellij.openapi.options.BoundSearchableConfigurable
+import com.intellij.openapi.options.Configurable.NoScroll
+import com.intellij.ui.dsl.builder.panel
+
+class QSSConfigurable : BoundSearchableConfigurable(
+    "QSS",
+    "QSS Editor Configurable"
+), NoScroll {
+    override fun createPanel() =  panel {
+        row {
+        }
+    }
+}

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

@@ -25,6 +25,12 @@
     <!-- Extension points defined by the plugin.
          Read more: https://plugins.jetbrains.com/docs/intellij/plugin-extension-points.html -->
     <extensions defaultExtensionNs="com.intellij">
+        <applicationConfigurable
+            parentId="language"
+            groupWeight="-500"
+            instance="irony.pycharm.qsseditor.QSSConfigurable"
+            id="irony.pycharm.qsseditor.QSSConfigurable"
+            displayName="QSS"/>
     </extensions>
     <actions>
         <action id="ApplyAction" class="irony.pycharm.qsseditor.ApplyAction" text="Apply Style" description="Apply Style">