Add spinitron API functions. #11614

Job	Run time
build_details	2s
build_js	2m 8s
build_opam (4.14.x)	8m 44s
build_opam (5.2.x)	5m 38s
lezer_parse	54s
tree_sitter_parse	48s
build_no_depopts	6m 1s
build_win32 (x64)	17m 26s
build_posix (debian_trixie, amd64)	15m 4s
run_tests (@citest)	12m 52s
update_doc	0s
build_posix (debian_bookworm, amd64)	14m 2s
build_posix (ubuntu_oracular, amd64)	14m 48s
run_tests (@doctest)	8m 3s
build_posix (ubuntu_noble, amd64)	14m 27s
build_posix (alpine, amd64)	11m 43s
run_tests (@mediatest)	12m 21s
fetch_s3_artifacts	22s
build_docker_alpine (amd64)	1m 4s
build_docker_minimal (amd64)	1m 58s
build_docker (amd64)	2m 15s
build_docker_alpine_minimal (amd64)	58s
update_release	0s
build_docker_release-minimal	0s
build_docker_release	0s
	2h 31m 38s

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