Idea: Comments

[Ekischleki]

Allowing comments would be a relatively easy and yet helpful thing to add to ✈ Flug ✈.
One would have to debate what comments look like (e.g. whether single line comments start with // or # or something else) and whether multi line comments should be a thing. For now adding something like

<...>
else if(current == '#') {
    while(pos + 1 < input.length) {
        pos += 1
        //Maybe some more robust handling for different types of newline
        if(input[pos] == '\n') {
            break
        }
    } 
}
<...>

to the tokenize function should be enough