Add: new gradle dependency versioning file and cleanup project buildgradle

build.gradle

@@ -1,25 +1,19 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
-  ext.kotlin_version = "1.5.10"
-  repositories {
-    google()
-    mavenCentral()
-  }
-  dependencies {
-    classpath "com.android.tools.build:gradle:4.2.1"
-    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+  apply from: 'versions.gradle'
 
-    // NOTE: Do not place your application dependencies here; they belong
-    // in the individual module build.gradle files
+  addRepos(repositories)
+
+  dependencies {
+    classpath deps.project.kotlin
+    classpath deps.project.gradle
   }
+
+  ext.kotlin_version = build_versions.kotlin
 }
 
 allprojects {
-  repositories {
-    google()
-    mavenCentral()
-    jcenter() // Warning: this repository is going to shut down soon
-  }
+  addRepos(repositories)
 }
 
 task clean(type: Delete) {