Add generic thread queues, use them to implement autocue-specific queue #11580

Job	Run time
build_details	2s
build_js	1m 52s
build_opam (4.14.x)	2m 43s
build_opam (5.2.x)	2m 44s
tree_sitter_parse	49s
build_no_depopts	2m 22s
lezer_parse	52s
run_tests (@citest)	2m 26s
run_tests (@doctest)	2m 24s
build_posix (debian_trixie, amd64)	2m 24s
build_win32 (x64)	2m 23s
run_tests (@mediatest)	2m 23s
update_doc	0s
build_posix (debian_bookworm, amd64)	2m 23s
build_posix (ubuntu_oracular, amd64)	2m 24s
build_posix (ubuntu_noble, amd64)	2m 23s
build_posix (alpine, amd64)	2m 27s
fetch_s3_artifacts	1s
update_release	1s
build_docker	1s
build_docker_alpine	1s
build_docker_alpine_minimal	1s
build_docker_minimal	1s
build_docker_release	1s
build_docker_release-minimal	1s
	33m 9s

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