solves build slowdown on spotless dependencies.

build.gradle

@@ -4,13 +4,24 @@ plugins {
     alias(libs.plugins.androidLibrary) apply false
     alias(libs.plugins.jetbrainsKotlinJvm) apply false
     alias(libs.plugins.androidBenchmark) apply false
-    alias(libs.plugins.diffplugSpotless) apply false
+    alias(libs.plugins.diffplugSpotless)
     alias(libs.plugins.googleServices) apply false
     alias(libs.plugins.jetbrainsComposeCompiler) apply false
 }
 
-subprojects {
+allprojects {
     apply plugin: 'com.diffplug.spotless'
+
+    if (project === rootProject) {
+        spotless {
+            predeclareDeps()
+        }
+        spotlessPredeclare {
+            kotlin {
+                ktlint("1.3.1")
+            }
+        }
+    } else {
         spotless {
             kotlin {
                 target '**/*.kt'
@@ -23,15 +34,17 @@ subprojects {
             groovyGradle {
                 target '*.gradle'
             }
+        }
+    }
+}
 
+subprojects {
     afterEvaluate {
         tasks.named("preBuild") {
             dependsOn("spotlessApply")
         }
     }
 }
-}
-
 
 tasks.register('installGitHook', Copy) {
     from new File(rootProject.rootDir, 'git-hooks/pre-commit')