feat: introduce spotless formatting for java

Author: simschla

.idea/misc.xml

@@ -7,6 +7,7 @@
 plugins {
     // Apply the java Plugin to add support for Java.
     id 'java'
+    id 'buildlogic.spotless-java-conventions'
 }
 
 repositories {

.idea/palantir-java-format.xml

@@ -0,0 +1,8 @@
+plugins {
+    id 'com.diffplug.spotless'
+}
+
+spotless {
+//    ratchetFrom 'origin/main'
+    encoding 'UTF-8'
+}

build-logic/src/main/groovy/buildlogic.java-common-conventions.gradle

@@ -0,0 +1,12 @@
+plugins {
+    id 'buildlogic.spotless-common-conventions'
+}
+
+spotless {
+    java {
+        palantirJavaFormat()
+        formatAnnotations()
+        removeUnusedImports()
+        importOrder('java|javax', 'org', 'com', 'com.diffplug', '', '\\#')
+    }
+}

build-logic/src/main/groovy/buildlogic.spotless-common-conventions.gradle

@@ -14,6 +14,9 @@ pluginManagement {
 plugins {
     // Apply the foojay-resolver plugin to allow automatic download of JDKs
     id 'org.gradle.toolchains.foojay-resolver-convention' version '0.8.0'
+    
+    // https://github.com/diffplug/spotless/blob/main/plugin-gradle/CHANGES.md
+    id 'com.diffplug.spotless' version '7.0.2' apply false
 }
 
 rootProject.name = 'spotless-cli'