Add assetsJar artifact for core (#4983)

* Add assetsJar artifact for core

* Add musicJar artifact for core

build.gradle

@@ -323,8 +323,28 @@ project(":core"){
         from sourceSets.main.allSource
     }
 
+    task assetsJar(type: Jar, dependsOn: ":tools:pack"){
+        classifier = 'assets'
+        from files("assets"){
+            exclude "config"
+            exclude "cache"
+            exclude "music"
+            exclude "sounds"
+        }
+    }
+
+    task musicJar(type: Jar){
+        classifier = 'music'
+        from files("assets"){
+            include "music/*"
+            include "sounds/*"
+        }
+    }
+
     artifacts{
         archives sourcesJar
+        archives assetsJar
+        archives musicJar
     }
 
     dependencies{