feat: support wrapped and document bullets

[dkarter]

Motivation

Support document-specific bullet markers and wrapped-line continuation behavior for RMS-70.

Linear: RMS-70

Summary of Changes

• Recognize LaTeX \item, Pandoc #., Org repeated *, and AsciiDoc repeated */. bullet markers.
• Continue wrapped lines from the nearest owning bullet when enable_wrapped_lines is enabled.
• Keep plain non-bullet lines after blank separation from creating bullets.
• Enable RMS-70 AsciiDoc, wrapped-line, and document bullet specs while leaving unrelated specs pending.

Testing

• mise run fmt:check
• mise run test

Dependencies/Special Considerations

Stacked on ordered bullet continuations: PR #7 / dorian/rms-69-implement-ordered-bullet-continuation.

Stack

1. feat: add neovim lua plugin scaffold #6
2. feat: continue standard bullets #4
3. feat: support ordered bullet continuations #7
4. feat: support wrapped and document bullets #9 👈 current
5. feat: handle empty bullets and spacing #10
6. feat: support outline promotion #11
7. feat: renumber bullet lists #12
8. feat: support nested checkboxes #13
9. chore: add release please #14
10. docs: add lazy.nvim usage #15