Update KMP + gradle wrapper

.idea/.copilot-plugin

@@ -1,6 +0,0 @@
-#Vaadin Copilot Integration Runtime Properties
-#Fri Apr 11 00:18:51 CEST 2025
-endpoint=http\://127.0.0.1\:63342/api/copilot-a099f404-091d-4ae5-afde-f116f71fbd1f
-ide=intellij
-supportedActions=write,writeBase64,delete,undo,redo,refresh,showInIde,getModulePaths,compileFiles,restartApplication
-version=1.4.8

.idea/inspectionProfiles/Project_Default.xml

@@ -1,5 +0,0 @@
-<component name="InspectionProjectProfileManager">
-  <profile version="1.0">
-    <option name="myName" value="Project Default" />
-  </profile>
-</component>

.idea/misc.xml

@@ -4,20 +4,5 @@
   <component name="FrameworkDetectionExcludesConfiguration">
     <file type="web" url="file://$PROJECT_DIR$" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" project-jdk-name="21" project-jdk-type="JavaSDK" />
-  <component name="ScriptDefinitionSettings">
-    <option name="settings">
-      <list>
-        <ScriptDefinitionSetting>
-          <option name="definitionId" value="org.jetbrains.kotlin.mainKts.MainKtsScript" />
-        </ScriptDefinitionSetting>
-        <ScriptDefinitionSetting>
-          <option name="definitionId" value="kotlin.Any" />
-        </ScriptDefinitionSetting>
-        <ScriptDefinitionSetting>
-          <option name="definitionId" value="kotlin.Any" />
-        </ScriptDefinitionSetting>
-      </list>
-    </option>
-  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_6" project-jdk-name="21" project-jdk-type="JavaSDK" />
 </project>