Switch back to Groovy DSL for root project build script

Unlike the Kotlin implementation allows creating extra properties that can be read inside the plugins block

app/build.gradle.kts

@@ -105,7 +105,7 @@ dependencies {
     implementation("androidx.activity:activity-compose:1.7.2")
 
     // Hilt
-    val hiltVersion = "2.48"
+    val hiltVersion: String by rootProject.extra
     implementation("com.google.dagger:hilt-android:$hiltVersion")
     ksp("com.google.dagger:hilt-android-compiler:$hiltVersion")
     ksp("androidx.hilt:hilt-compiler:1.1.0-alpha01")

build.gradle

@@ -0,0 +1,28 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+    ext {
+        agpVersion = "8.1.1"
+        hiltVersion = "2.48"
+        kotlinVersion = "1.9.10"
+    }
+}
+
+plugins {
+    id("com.android.application") version "$agpVersion" apply false
+    id("com.android.library") version "$agpVersion" apply false
+    id("org.jetbrains.kotlin.android") version "$kotlinVersion" apply false
+    id("com.google.dagger.hilt.android") version "$hiltVersion" apply false
+    id("com.google.devtools.ksp") version "$kotlinVersion-1.0.13" apply false
+    id("org.gradle.android.cache-fix") version "2.7.4" apply false
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+tasks.register("clean", Delete) {
+    delete(rootProject.buildDir)
+}