Apply code formatting and consolidate repository configuration

- Apply Google Java Format to all Java source files for consistent code style
- Move repository configuration to root build.gradle.kts to reduce duplication
- Configure Spotless plugin for automatic code formatting across all projects

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: nakamura-to

build.gradle.kts

@@ -1,4 +1,20 @@
 plugins {
-    base
+    java
+    alias(libs.plugins.spotless)
 }
 
+val catalog = libs
+
+allprojects {
+    apply(plugin = catalog.plugins.spotless.get().pluginId)
+
+    spotless {
+        java {
+            googleJavaFormat(libs.versions.google.java.format.get())
+        }
+    }
+
+    repositories {
+        mavenCentral()
+    }
+}

compile-java-test/build.gradle.kts

@@ -14,10 +14,6 @@ tasks {
     }
 }
 
-repositories {
-    mavenCentral()
-}
-
 dependencies {
     annotationProcessor(libs.doma.processor)
     implementation(libs.doma.core)

compile-java-test/src/main/java/example/Employee.java

@@ -5,7 +5,6 @@
 
 @Entity
 public class Employee {
-    @Id
-    public Integer id;
-    public String name;
+  @Id public Integer id;
+  public String name;
 }

compile-java-test/src/main/java/example/EmployeeDao.java

@@ -6,9 +6,9 @@
 
 @Dao
 public interface EmployeeDao {
-    @Select
-    Employee selectById(Integer id);
+  @Select
+  Employee selectById(Integer id);
 
-    @Script
-    void create();
+  @Script
+  void create();
 }

compile-java-test/src/test/java/example/GenerationTest.java

@@ -1,9 +1,9 @@
 package example;
 
-import org.junit.jupiter.api.Test;
-
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 
+import org.junit.jupiter.api.Test;
+
 public class GenerationTest {
 
   @Test

compile-kotlin-test/build.gradle.kts

@@ -14,10 +14,6 @@ java {
     toolchain.languageVersion.set(JavaLanguageVersion.of(libs.versions.java.get().toInt()))
 }
 
-repositories {
-    mavenCentral()
-}
-
 tasks {
     test {
         useJUnitPlatform()

compile-mix-test/build.gradle.kts

@@ -20,10 +20,6 @@ tasks {
     }
 }
 
-repositories {
-    mavenCentral()
-}
-
 dependencies {
     kapt(libs.doma.processor)
     implementation(libs.doma.core)

compile-mix-test/src/main/java/example/Address.java

@@ -5,7 +5,6 @@
 
 @Entity
 class Address {
-    @Id
-    public Integer id;
-    public String name;
-}
+  @Id public Integer id;
+  public String name;
+}

compile-mix-test/src/main/java/example/AddressDao.java

@@ -1,14 +1,14 @@
 package example;
 
 import org.seasar.doma.Dao;
-import org.seasar.doma.Select;
 import org.seasar.doma.Script;
+import org.seasar.doma.Select;
 
 @Dao
 interface AddressDao {
-    @Select
-    Address selectById(Integer id);
+  @Select
+  Address selectById(Integer id);
 
-    @Script
-    void create();
-}
+  @Script
+  void create();
+}

compile-mix-test/src/test/java/example/GenerationTest.java

@@ -1,9 +1,9 @@
 package example;
 
-import org.junit.jupiter.api.Test;
-
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 
+import org.junit.jupiter.api.Test;
+
 public class GenerationTest {
 
   @Test