🎨 Add spotless formatting

.prettierrc.yml

@@ -0,0 +1,7 @@
+plugins:
+  - prettier-plugin-java
+parser: java
+printWidth: 120
+tabWidth: 4
+singleQuote: false
+useTabs: false

build.gradle.kts

@@ -2,11 +2,16 @@ plugins {
 	java
 	id("org.springframework.boot") version "3.3.5"
 	id("io.spring.dependency-management") version "1.1.6"
+	id("com.diffplug.spotless") version "6.25.0"
 }
 
 group = "io.github.markl4yg.hca"
 version = "0.0.1-SNAPSHOT"
 
+apply(
+	from = file("./gradle/spotless.gradle")
+)
+
 java {
 	toolchain {
 		languageVersion = JavaLanguageVersion.of(21)

gradle/spotless.gradle

@@ -0,0 +1,14 @@
+import java.nio.charset.StandardCharsets
+
+spotless {
+    enforceCheck(false)
+    ratchetFrom "origin/main"
+
+    java {
+        target "src/**/java/**/*.java"
+        encoding(StandardCharsets.UTF_8)
+        removeUnusedImports()
+        prettier(['prettier': '3.0.3', 'prettier-plugin-java': '2.3.0'])
+            .configFile('.prettierrc.yml')
+    }
+}