Add generic thread queues, use them to implement autocue-specific queue #11579

Job	Run time
build_js	1m 54s
build_opam (4.14.x)	2m 29s
build_details	2s
build_opam (5.2.x)	2m 28s
build_no_depopts	2m 5s
build_win32 (x64)	2m 6s
build_posix (debian_trixie, amd64)	2m 5s
lezer_parse	54s
build_posix (debian_bookworm, amd64)	2m 8s
run_tests (@citest)	2m 4s
build_posix (ubuntu_oracular, amd64)	2m 5s
tree_sitter_parse	47s
run_tests (@doctest)	2m 2s
build_posix (ubuntu_noble, amd64)	2m 3s
update_doc	0s
run_tests (@mediatest)	1m 39s
build_posix (alpine, amd64)	2m 6s
fetch_s3_artifacts	1s
update_release	1s
build_docker	1s
build_docker_alpine	1s
build_docker_minimal	1s
build_docker_alpine_minimal	1s
build_docker_release	1s
build_docker_release-minimal	1s
	29m 5s

Provide feedback