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/application/src/lib/queries/search-my-issues.query-handler.ts

@@ -21,6 +21,7 @@ export class SearchMyIssuesQueryHandler
       assigneeId: query.filter.assignedToMe ? query.viewerId : undefined,
       statuses: query.filter.statuses,
       categories: query.filter.categories,
+      search: query.filter.search?.trim().slice(0, 200) || undefined,
       limit: Math.min(query.filter.limit, 200),
       offset: query.filter.offset,
     });