refactor(pkg): pattern match on importance #29337

Job	Run time
Format	1m 5s
Documentation	58s
Build monorepo benchmark docker image	3m 34s
Build (macos-latest, 5.1.x)	13m 42s
Wasm_of_ocaml	11m 13s
Build (ubuntu-latest, 5.1.x)	9m 2s
Nix (macos-latest)	1m 59s
Build (ocaml-variants.5.3.0+trunk, ubuntu-latest, true)	1m 38s
Nix (ubuntu-latest)	57s
Build microbenchmarks	2m 35s
Coq 8.16.1	7m 8s
Build (4.14.x, ubuntu-latest, true)	1m 30s
Build (4.14.x, macos-latest, true)	2m 16s
Create local opam switch (macos-latest, 5)	6m 57s
Build (5.1.x, macos-13, true)	5m 5s
Create local opam switch (macos-latest, 4.14)	5m 57s
Build (ocaml-base-compiler.4.14.2,system-msvc, windows-latest)	14m 14s
Create local opam switch (ubuntu-latest, 5)	5m 12s
Build (ocaml-base-compiler.5.1.1,system-mingw, windows-latest)	8m 12s
Create local opam switch (ubuntu-latest, 4.14)	5m 11s
Build (4.08.x, ubuntu-latest, true)	1m 31s
Build (4.04.x, ubuntu-latest, true, true)	4m 41s
Build (4.02.x, ubuntu-latest, true)	3m 54s
	1h 58m 31s

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