Add columns to FIXME and TODO tag checks

[mhanberg]

This allows text editors to correctly render the diagnostic

Before:

After:

[mhanberg]

I'll look into those test failures

[rrrene]

This is looking good so far, thanks! 👍

We just have to make sure that it also works for module attributes, because the checks also catch the "tag" (TODO or FIXME) in those:

@doc """
Does something incredible. Returns `:ok` or `:error`.

TODO: add example
"""

Judging from the code, I get the impression that this is not considered yet?

[rrrene]

Hi, after writing the above, I realized that all I wrote was technically true, but of no concern to this PR 😞 🙏

I also realized that the column should have been there in the first place and fixed something in Credo.Check so that TagTODO and TagFIXME aren't the only checks benefiting from our exchange 👍

Could you check if your problem is now solved on master?