Parser reporting wrong kind of error

[SlothScript]

Suppose you have this code:

fn main() {
    let a = 3;
    println(a);
}

This prints "3" as expected. Now use this code:

fn func() {
    return 3;
}

fn main() {
    let a = func();
    println(a);
}

Expected behavior

This code should also print 3, but instead it says:

AST Error[0x300002]: Expected a semicolon at the end of the line
     ┌─ ./src/main.rt:6:18
     │
   6 │     return 3;     
     │                  ^ Insert semicolon (;)```

[CiroZDP]

By the way, the return instruction is not being parsed at all because I didn't implement it yet.
This has to do with this bug.
The bug that makes the parser not knowing what to do with random tokens could cause to ignore part of them and parse something like 3; and if the parser thinks that is an operator it would be reporting an malformed operator error, which is not the problem at all.

[CiroZDP]

Please, work on top of the following branch:

• https://github.com/ruthenium-lang/ruthenium/tree/hotfix%2Fwrong-error-kind