- Update the mdformat hook because that version seems broken.
- Add the codespell hook, fix some spelling errors.

Try to embed the GitLab snippets. Allow raw HTML for that.

The raw HTML in that page isn't styled properly after switching to the
Seafoam theme.

This reverts commit 10288047.

I think that those JS scripts were needed (show all posts needs that I
think).

Removes the JS in the theme.

No much point in just running pre-commit.

Ansible.

In the spam me page.

But only on the master branch and if pre-commit doesn't fail.

79 characters limit.

- Adding checks.
- Add to CI.
- Address issues.

Also, fix the link to GitLab and include a copy of the license.