Add Bookmarks section to command overlay

Design's command switcher exposes Open tabs / History / Bookmarks /
Actions. The implementation now includes a Bookmarks section sourced
from snapshot.bookmarks: filtered by lowercase needle on title and
URL, capped at RESULT_LIMIT, rendered with brand glyphs, opening the
URL on click.

Match helpers (matching_tabs / matching_history / matching_bookmarks)
move into chrome::command_match so command_overlay.rs stays under the
500-line ceiling. Ask ELY remains skipped — no AI surface in domain
yet, no fabrication.

crates/ely_app/src/shell/chrome/mod.rs

@@ -2,6 +2,7 @@ pub(crate) mod appearance_form;
 pub(crate) mod appearance_layout_cards;
 pub(crate) mod brand_glyph;
 pub(crate) mod command_footer;
+pub(crate) mod command_match;
 pub(crate) mod command_overlay;
 pub(crate) mod home;
 pub(crate) mod plugin_detail_view;