Add licensing info and new contribution policy

buildSrc/build.gradle.kts

@@ -0,0 +1,22 @@
+plugins {
+    kotlin("jvm") version "1.8.10"
+    `kotlin-dsl`
+}
+repositories {
+    mavenCentral()
+    maven {
+        name = "jitpack"
+        url = uri("https://jitpack.io")
+    }
+}
+dependencies {
+    implementation("com.github.romangraef:neaslicenseextractificator:1.1.0")
+}
+
+sourceSets {
+    main {
+        kotlin {
+            srcDir(file("src"))
+        }
+    }
+}