test: add multicloze weighted-presenter dispatch coverage

8 ERT tests covering hide1-firstmore, show1-lastmore, show1-firstless.
Each wraps a cond that selects between common and uncommon multicloze
presenters based on org-drill-cloze-text-weight and the entry's
total-repeats counter.

Underlying presenter functions are mocked to no-op stubs that record
which one was selected — the branch logic is what's under test, not
the (interactive) cloze-prompt itself.

Cases covered per function:
- nil weight → fall back to non-weighted variant
- invalid weight (non-positive int) → error
- non-trigger rep → common path (hide-first / show-last / skip-first)
- trigger rep → uncommon path (hide-n with appropriate force flags)

0 files changed, 0 insertions, 0 deletions