feat: added ShadowJar plugin

api/build.gradle

@@ -1,3 +1,29 @@
+plugins {
+    id 'com.github.johnrengelman.shadow' version '7.0.0'
+}
+
+tasks {
+    shadowJar {
+        manifest {
+            attributes (
+                    "Multi-Release": true,
+                    "Add-Opens": "java.base/java.lang " +
+                            "java.base/java.lang.reflect"
+            )
+        }
+
+        mergeServiceFiles()
+    }
+
+    java {
+        targetCompatibility = JavaVersion.VERSION_21
+    }
+
+    assemble {
+        dependsOn shadowJar, processResources
+    }
+}
+
 dependencies {
     api project(":resource-compiler")