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>

pnpm-lock.yaml

@@ -17,6 +17,9 @@ importers:
       '@citation-evidence/evidence-source':
         specifier: link:../evidence-source
         version: link:../evidence-source
+      '@citation-evidence/work':
+        specifier: link:../citation-work
+        version: link:../citation-work
       jszip:
         specifier: ^3.10.1
         version: 3.10.1