def: macros for creating copattern definitions

[TOTBWF]

Description

There are a couple of places in the 1Lab where we manually eta-expand out copattern definitions by hand to get better goal display. This mostly comes up when dealing with things like subcategories/forgetful functors; Agda will very happily unfold your nicely named category into Restrict Blah, which is not particularly helpful!

Manually performing these copattern expansions is a bit of a pain, so this PR adds a small macro that performs this mechanical busywork for us. This removes the need for the declare-concrete-category macro in #375.

Checklist

Before submitting a merge request, please check the items below:

• I've read the contributing guidelines.
• The imports of new modules have been sorted with support/sort-imports.hs (or nix run --experimental-features nix-command -f . sort-imports).
• All new code blocks have "agda" as their language.

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[ncfavier]

Can this be unified with Cat.Functor.Coherence?

[Lavenza]

Pull request preview

[TOTBWF]

Can this be unified with Cat.Functor.Coherence?

Should be able to! We will need to generalize make-copattern to work on functions into record types, but this shouldn't be too hard.

[TOTBWF]

Should be good to go. Played around with a version of "deep" cohere! that would let us solve things like https://1lab.dev/Cat.Functor.Adjoint.html#25843 but this proved to be a bit tricky

[plt-amy]

Looks good, are there places we can use it? (Sheaves, I guess? But I'm not done writing that yet :/)

[TOTBWF]

Sorry, have been quite busy recently! Sheaves would be a good place, likewise for categories of free F-algebras