Terminal styling and layout widgets for OCaml (tables, trees, panels, colors)
oci: rename test_helpers to helpers, use failf for formatted fails
Test_helpers wasn't a real test module so it's renamed to helpers.ml/.mli
to satisfy the test-file naming convention. Replace
Alcotest.fail (Fmt.str ...) with Alcotest.failf in test_index and
test_manifest.
test/dump_progress.ml
test/cram/helpers/dump_progress.ml
test/dump_progress.ml
test/cram/helpers/dump_progress.ml
test/progress.t/run.t
test/cram/progress.t/run.t
test/progress.t/run.t
test/cram/progress.t/run.t