refactor: consume @citation-evidence/work for review mode (CWORK-WP-0001 cutover)

Cut review mode over to the extracted citation-work package instead of a local
src/work/ implementation.

- Add @citation-evidence/work as a link: dependency
- Repoint the @work alias (tsconfig + vite) to ../citation-work/src/work and
  allow vite fs access to the sibling
- Remove the local src/work/ implementation (now owned by citation-work)

Typecheck, lint, and the full test suite (51 tests) pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

package.json

@@ -22,6 +22,7 @@
     "@citation-evidence/engine": "link:../citation-engine",
     "@citation-evidence/evidence-source": "link:../evidence-source",
     "@citation-evidence/evidence-anchor": "link:../evidence-anchor",
+    "@citation-evidence/work": "link:../citation-work",
     "jszip": "^3.10.1",
     "pdfjs-dist": "^4.4.168",
     "react": "^18.3.1",