Migrate Gradle wrapper to 8.14.5, clean IntelliJ and build artifacts, and update configuration handling

gradle/wrapper/gradle-wrapper.properties

@@ -1 +1,7 @@
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.8-bin.zip
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.5-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists