Type: mojikumi — Line-end Punctuation Half Width for Japanese punctuation

Japanese full-width punctuation is half a mark and half a space (an
opening bracket's space before it; a closing bracket's, comma's or full
stop's after it). Set solid, 」「 or 。」 show a full em of air between
the marks, and a line ending in 。 stops half an em short of the edge.

- `ParaStyle.mojikumi` (Paragraph panel › Mojikumi): None, or Line-end
  Punctuation Half Width, which (JLREQ 3.1.4) lets consecutive
  punctuation share one half-em space — a closing mark followed by
  punctuation loses the space after it, an opening bracket after another
  the space before it — and sets a closing mark ending a line half
  width. Only full-width marks (advance an em) are touched, never inside
  a tate-chu-yoko block; vertical type the same way down the column.
- New type (`text.create`, Area/Path Type) takes Line-end Punctuation
  Half Width, the usual default of Japanese layout; documents from
  before it and imported text keep None (written only when set, so
  older files and older apps are unaffected). `text.setFormat
  {mojikumi: "none"|"lineEndHalf"}`.
- Builds on #344: on justified lines the room it frees is spread
  between the characters.
- Catalog rows in ja and zh-hant.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/engine/src/cmd/textedit.rs

@@ -378,6 +378,7 @@ fn create_in_path(s: &mut Session, p: &Value) -> Result<Value> {
         wrap: Vec::new(),
         cached_bounds: None,
     };
+    t.para.mojikumi = vectorcraft_doc::Mojikumi::LineEndHalf;
     refresh_bounds(&mut t);
     let id = s.edit(if on_path { "Type on a Path" } else { "Area Type" }, |d, sel| {
         let (par, idx, _) = d.position(pid).ok_or(EngineError::NoNode(pid))?;