Add CI for automatic release file generation

[C0rn3j]

Seems like it would be nice to add CI for generating the dictionary files at least as a preview, as currently the latest available version is from 2020, and knowing when a PR breaks things would be nice too.

If there is interest in this, and it's actually not computationally impossible to get this running on GitHub CI, I can try taking a stab at getting it done.

Together with making some easy contrib doc as per #408, it should be easier to get people to submit PRs instead of Issues, which would enable one-click verified solution when someone wants to add a word, making the effort needed to accept contributions low, hopefully enabling it to not be such a mental load that the maintainers only do it in large batches.

[kevina]

There is no CI, but there is a repo to track changes to the genereted files at https://github.com/en-wl/wordlist-diff. This is something that is done manually locally and then pushed to GitHub. I will be open to automatting this.

[kevina]

Note that the wordlist-diff repo is a a little weird, the actual code is in the code branch.