Add support for the [djlinter](https://www.djlint.com/)

[vds2212]

This code aim to propose a linter for the djlinter from: djlinter

[hsanson]

PR in incomplete. Please ensure to:

• Add linter tests (example)
• Add handler tests (example)
• Add entry to supported-tools.md (example)
• Add entry to doc/ale.txt (example)
• Add entry to ale-supported-languages-and-tools.txt (example)
• Add entry to ale-html.txt (example)
• Ensure all above entries are added in alphabetical order.

[vds2212]

I have complete the tasks indicated. Let me know if you want me to do something else.

[vds2212]

I found an obvious mistake :-|
Is there a way I can run the test myself before requesting GitHub to re-run them?