Add skeleton Js5LibraryReader

Signed-off-by: Graham <gpe@openrs2.dev>

asm/src/main/java/dev/openrs2/asm/io/Js5LibraryReader.kt

@@ -0,0 +1,11 @@
+package dev.openrs2.asm.io
+
+import dev.openrs2.asm.classpath.Library
+import java.io.InputStream
+
+object Js5LibraryReader : LibraryReader {
+    override fun read(input: InputStream): Library {
+        // TODO(gpe): implement
+        return Library()
+    }
+}