- C frontend broken for now

- If statements work properly now (hopefully)
- still issues with while loops pushing vars to the stack. need scoping
  implemented to fix this!

- refactored registers.rs and fixed faulty logic.
- made register allocation optimisations

compiler/src/frontend/mod.rs

@@ -1,12 +1,12 @@
 use crate::model::{CompilerError, Program};
 
-mod c;
+// mod c;
 mod dsc;
 
 pub fn compiler_frontend(ext: &str, data: &str) -> Result<Program, CompilerError> {
     match ext {
         "dsc" => Ok(dsc::generate_ast(&data)?),
-        "c" => Ok(c::generate_ast(&data)?),
+        // "c" => Ok(c::generate_ast(&data)?),
         _ => Err(CompilerError::Generic(format!(
             "File type {} not supported",
             ext