feat: Add colors to parser errors

[herluf-ba]

Closes #7700

This PR adds colors to parser errors. It also makes sure all errors are similarly worded, has context and the right source location and is reasonably concise.
Here's a preview of how the colors look for this faulty program:

def one() Int16 = 1i16

def main(): Bool =
    let l = List#{1, 2, 3,};
    List.length(l) == one()

Although completely unrelated please take a moment to enjoy the type error despite having two syntax errors.

[magnus-madsen]

@herluf-ba Conflicted again, sorry.

[magnus-madsen]

I like the changes 👍

[herluf-ba]

@magnus-madsen This is ready for another round of review 👍

[magnus-madsen]

I have added a lot of comments. My review boils down to:

• We should think of the error classes themselves as data types in their own right. This means they must be "well designed" and limit how "stringly" typed they are. The reason is that this make the errors reusable, e.g. for VSCode when we want to provide quick fixes, auto-complete etc.

[herluf-ba]

@magnus-madsen I addressed all of your comments 👍

[magnus-madsen]

Merged! Thanks