Support Tailwind prefixed classes

[techniq]

Support prefix defined in the Tailwind config.

See discussion

Will also need to update cls which uses tailwind-merge and support prefix

Getting this to work with JIT will also be challenging as ${twPrefix}some-class wouldn't work, although maybe leveraging a preprocessor might.

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Other projects

• Tremor determined it wasn't possible for them to support

[techniq]

This might be improved once settings() is implemented.

[techniq]

Prefix config changed in v4.

See also: #259