Replacement equivalent for `@theme`

[t-bltg]

Following #79, what is the replacement for the @theme macro, and the example in https://highlights.juliadocs.org/stable/man/theme/#The-@theme-Macro-1 ?

Used here : https://github.com/FedeClaudi/Term.jl/blob/master/src/theme.jl#L379-L400.

@MichaelHatherly, I'm trying to port https://github.com/FedeClaudi/Term.jl/blob/master/src/highlight.jl and https://github.com/FedeClaudi/Term.jl/blob/master/src/theme.jl, and some guidelines would be appreciated ...

[MichaelHatherly]

#81 has some draft migration docs as well as a fix for the dropped styling feature.

[t-bltg]

Awesome, many thanks 🙏

[MichaelHatherly]

There's sufficient docs to cover how @theme should be replaced in 81. Closing.