Support LiveView 1.0 HEEX with bracket interpolation

[axelclark]

LiveView 1.0 introduced new HEEX syntax which allows interpolation with brackets in HTML body, see sigil_h docs. The current TailwindFormatter uses engines and tokenizer code copied from LiveView version 0.20.1. If you run mix format --check-formatted on a Phoenix LiveView 1.0 project, it will return an error.

I copied over the equivalent code from LiveView 1.0.9, and mix format --check-formatted is successful in my project. I can open up a PR with those changes, but I was wondering if you planned to continue with that approach and how it would work with your project versioning.

[aptinio]

In #35, I mentioned it would be best if PhoenixLiveView exposes HTMLFormatter.tokenize/1 as a public function, so that we don't have to vendor PhoenixLiveView code and we can stay in sync with PhoenixLiveView. I finally made phoenixframework/phoenix_live_view#3778 that does that. Hopefully, it'll be accepted.

[brainlid]

The ability to do this was upstreamed:

• Expose HTMLFormatter.tokenize/1 as a public function phoenixframework/phoenix_live_view#3778 - where the initial discussion took place
• Support attribute_formatters phoenixframework/phoenix_live_view#3781 - reworked into a changed called "Support attribute_formatters" that was included in LiveView v1.1

It allows for solving this by plugging in an attribute formatter like tailwind_formatter.