feat: global search and keyboard shortcuts

Ctrl/⌘ K (or /) opens a search over the projects and tickets of all my
projects, driven by the keyboard. g plus a letter moves between project
pages, c creates a ticket on the board, e edits the open ticket and ?
lists every shortcut. My work can now be searched by text through the API.

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

libs/api/tracker/presenters/src/lib/http/issues.controller.ts

@@ -130,6 +130,7 @@ export class IssuesController {
       assignedToMe: query.assignedToMe,
       statuses: query.status,
       categories: query.category,
+      search: query.search,
       limit: query.limit,
       offset: query.offset,
     });