chore: add djlint and reformat templates

[ar4s]

You can tune configuration with ease, see docs

[nfoert]

Thanks for working on this! This looks very helpful, and I think it works great.
I fixed an issue with unnecesary </input> tags effecting the formatting and made a couple changes to the configuration file as well.
It seems like there's no existing GitHub Actions options for djlint which is unfortunate, but I added a task to tasks.json to easily allow contributors to format all of the templates when they wish.