Zotero: text typed just after a citation goes outside its field

[marcoarnulfo]

Fixes #898.

A range field's end marker takes no room, so a click just after a citation puts the caret before it: whatever you typed there went into the citation's result, Zotero then saw the citation as edited by hand, and asked to replace it when you added another citation or the bibliography (it reported the caret as inside the field). Right after inserting a citation it worked only because the bridge leaves the caret after the marker. Now a collapsed caret sitting on one or more field ends is moved past them (Document::past_field_ends) before typing/pasting, before Zotero inserts a field, and when Zotero asks whether the cursor is in a field, which matches Word, where text typed right after a field lands outside it. The arrow-key step over the invisible marker the reporter noticed is unchanged; happy to look at that separately if you'd like.

Validation:

• tests_typing::typing_after_a_citation_goes_outside_its_field (clicks just after the citation through the layout, then types): fails on main (field result becomes (Smith 2020). Dogs bark.), passes here
• zotero tests::a_citation_added_just_after_another_is_not_nested_in_it: fails on main (Document_cursorInField returns the first citation), passes here
• cargo test -p wordcraft-engine --lib tests_typing::, cmd::fields, cmd::citations, cmd::controls, cmd::speech; cargo test -p wordcraft-zotero --lib tests::
• cargo clippy -p wordcraft-doc -p wordcraft-engine -p wordcraft-zotero --all-targets -- -D warnings, cargo fmt --all -- --check
• (macOS, Apple silicon)

[echelon]

Thanks for the contribution, @marcoarnulfo! This has landed in main. If you haven't already, come join us on Discord: https://discord.gg/artcraft