Added more tests and code cleanups

Author: mirkosertic

README.md

@@ -1,6 +1,6 @@
 # MetaIR
 
-[![Java CI with Maven](https://github.com/mirkosertic/MetaIR/actions/workflows/maven.yml/badge.svg?branch=main)](https://github.com/mirkosertic/MetaIR/actions/workflows/maven.yml)
+[![Java CI with Maven](https://github.com/mirkosertic/MetaIR/actions/workflows/build.yml/badge.svg?branch=main)](https://github.com/mirkosertic/MetaIR/actions/workflows/maven.yml)
 
 MetaIR is a graph-based intermediate representation (IR) for JVM bytecode, built on Cliff Click's Sea-of-Nodes concept. 
 The framework leverages the Java Class-File API introduced in Java 24 (JEP 484).