tree-sitter: restore extraGrammars #142157

Job	Run time
prepare	38s
Eval / misc	1m 24s
Build / aarch64-linux: shell, docs	35s
Build / aarch64-darwin: shell	1m 42s
Check / owners	25s
Build / x86_64-linux: shell, docs, lib, tarball	2m 22s
Check / commits	16s
Check / manual-file-edits	14s
Lint / treefmt	1m 53s
Lint / commits	27s
Lint / parse	1m 13s
Lint / nixpkgs-vet	1m 28s
Eval / x86_64-linux	3m 28s
Eval / x86_64-darwin	3m 0s
Eval / aarch64-linux	3m 12s
Eval / aarch64-darwin	2m 49s
Eval / versions	-1s
Eval / compare	42s
Eval / report	-1s
unlock	6s
Bot / run	43s
	26m 35s

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