Add module-info.java with module dependencies

Author: NonSwag

src/main/java/module-info.java

@@ -0,0 +1,9 @@
+// import org.jspecify.annotations.NullMarked;
+
+// @NullMarked
+module net.thenextlvl.vault {
+    requires java.logging;
+    requires org.bukkit;
+ 
+    requires static org.jspecify;
+}