Serial.java clean up

[gr812b]

Serial.java file is very messy and difficult to understand. Would be worth a comb over to clarify and clean code. Some of the code, namely the file names that it writes to, is hardcoded as well, which would be nice to one day be able to define on the front end

[gr812b]

This should further be fixed and moved away from static implementation. Quarkus works with managed beans which can have far better control, readability and options outside of what static offers, which is better for a complex system such as one we have.