a lot of refactoring and re-implementing tests for FunctionEntry

src/lib.rs

@@ -1,6 +1,7 @@
 #![allow(clippy::unused_unit)] // Fixes clippy keep complaining about wasm_bindgen
 #![feature(const_mut_refs)]
 
+mod consts;
 mod egui_app;
 mod function;
 mod function_output;