Make All Documents accessible to VoiceOver on macOS

[johanntan]

Summary

• use DataViewListCtrl for the All Documents table on macOS so VoiceOver can read its rows and columns
• preserve the existing ListCtrl implementation on Windows and Linux
• keep selection, activation, filtering, removal, focus, scrolling, and select-all behavior across both controls
• update wxDragon to the revision containing the safe data-view APIs from Expose DataViewListCtrl selection and visibility helpers AllenDang/wxDragon#204

Motivation

The Table of Contents and Elements dialogs already use native data-view controls on macOS for VoiceOver accessibility. All Documents still used ListCtrl, which VoiceOver did not expose as a readable table.

Validation

• manually tested the All Documents table with VoiceOver on macOS
• cargo fmt --check
• cargo check -p paperback --locked
• cargo test -p paperback (40 passed)
• cargo build -p paperback