Main now has page actions, timers and layers (#6985) and shared text
allowances for inspection (#6015). Conflicts:
- render/inspect/annotations.rs: main's collect_link (which notes
JavaScript even when the link isn't listed) takes this branch's link
script budget and its once-only warning; push_link is gone.
- automation form_tools.rs, js tests.rs, docs/acroform-script-workflows.md:
both sides added at the same place; both kept.
Adapted to main: the link runner's Job gets `timer: None`, and, as a
button's script does, the document's layers and the fields as page
actions and timers show them (live_state).