Rux templates

[aalin]

The current markup generator is not very nice to work with.

JSX is great because it's regular JavaScript extended with a subset of XML, so it's very easy to distinguish between elements and logic.

Rux extends whitequark/parser to parse a similar syntax in Ruby. Initially I used Rux for templating, and it's great, except there is no support for it anywhere.

Ruby doesn't really have a culture of transpiling code like there is in the JS-world, so there are no source maps for Ruby, which means that errors will show up where they occurred in the transpiled code, and not in the written code.

So a few things to do:

• [x] Fix issues with indentation becoming text nodes with spaces (https://github.com/mayu-live/framework/blob/main/lib/mayu/resources/rux.rb#L5-L13)
• [ ] Investigate if there would be some way to implement source maps (https://github.com/camertron/rux/issues/1)
• [ ] Investigate if there would be some way to run Sorbet on transpiled output and mapping errors to Rux source
• [ ] Investigate how difficult it would be to patch tree-sitter-ruby to support Rux syntax.

[aalin]

Decided to use HAML instead. Rux has been great so far, but HAML has better editor support. HAML is probably also a better choice for a Ruby framework since HAML was made for Ruby, while JSX was made for JavaScript and fits better there...