We need to move away from dartsass-ruby

[tomhughes]

We are currently using dartsass-ruby as a dependency of dartsass-sprockets but v1.x of the uri gem has an ABI change which breaks it:

bin/rails aborted!
ArgumentError: wrong number of arguments (given 1, expected 0) (ArgumentError)
/home/tom/.bundle/ruby/3.3.0/gems/uri-1.0.1/lib/uri/rfc3986_parser.rb:73:in `initialize'
/home/tom/.bundle/ruby/3.3.0/gems/dartsass-ruby-3.0.2/lib/sassc/url.rb:5:in `new'
/home/tom/.bundle/ruby/3.3.0/gems/dartsass-ruby-3.0.2/lib/sassc/url.rb:5:in `<module:URL>'
/home/tom/.bundle/ruby/3.3.0/gems/dartsass-ruby-3.0.2/lib/sassc/url.rb:4:in `<module:SassC>'
/home/tom/.bundle/ruby/3.3.0/gems/dartsass-ruby-3.0.2/lib/sassc/url.rb:3:in `<main>'
/home/tom/.bundle/ruby/3.3.0/gems/dartsass-ruby-3.0.2/lib/sassc.rb:54:in `require_relative'
/home/tom/.bundle/ruby/3.3.0/gems/dartsass-ruby-3.0.2/lib/sassc.rb:54:in `<main>'

As dartsass-ruby has been abandoned it seems either dartsass-sprockets will need updating or we will need to replace it.

[tomhughes]

Ah it has already been changed in dartsass-sprockets but we have a version lock on sass-embedded which is stopping it from updating.

[tomhughes]

The version lock is from 41f13ac and it seems our bootstrap is still too old to avoid the warnings.