feat: extract review-workspace slice into @citation-evidence/work (CWORK-WP-0001)

Establishes citation-work as the standalone home of the review workspace,
migrated out of the citation-evidence umbrella app.

- Package/tooling scaffold: package.json, tsconfig, vite/vitest/eslint configs
  with eslint-plugin-boundaries enforcing engine/anchor/source-only imports
- Providers/hooks: EngineProvider, SessionProvider + use* hooks (T02)
- Panes: CollectionList, ViewerShell, EvidenceSidebar (T03/T04/T05)
- Capture/edit: InlineCaptureForm, EvidenceFormBody; UploadDropzone owned here
- ReviewShell: repo-owned three-pane layout with an upload slot seam
- Tests: CollectionList, InlineCaptureForm capture flow, EvidenceSidebar
  export/edit/activation (11 tests, all green)
- Anchor consumed as @citation-evidence/evidence-anchor package; @source kept
  on the umbrella facade for its local viewer-url policy
- Docs (README/SCOPE) refreshed; deferred gaps recorded

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

package.json

@@ -0,0 +1,60 @@
+{
+  "name": "@citation-evidence/work",
+  "version": "0.0.0",
+  "private": true,
+  "description": "Review workspace UI for the citation-evidence ecosystem.",
+  "license": "Apache-2.0",
+  "type": "module",
+  "packageManager": "pnpm@9.15.0",
+  "engines": {
+    "node": ">=20.10.0"
+  },
+  "files": [
+    "src",
+    "README.md",
+    "LICENSE",
+    "SCOPE.md",
+    "INTENT.md"
+  ],
+  "exports": {
+    ".": "./src/work/index.ts"
+  },
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b --noEmit && vite build",
+    "preview": "vite preview",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "lint": "eslint .",
+    "typecheck": "tsc -b --noEmit"
+  },
+  "dependencies": {
+    "@citation-evidence/engine": "link:../citation-engine",
+    "@citation-evidence/evidence-anchor": "link:../evidence-anchor",
+    "@citation-evidence/evidence-source": "link:../evidence-source",
+    "pdfjs-dist": "^4.4.168",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
+    "react-pdf-highlighter-plus": "^1.1.4"
+  },
+  "devDependencies": {
+    "@testing-library/dom": "^10.4.1",
+    "@testing-library/react": "^16.3.2",
+    "@testing-library/user-event": "^14.6.1",
+    "@types/node": "^20.14.0",
+    "@types/react": "^18.3.3",
+    "@types/react-dom": "^18.3.0",
+    "@vitejs/plugin-react": "^4.3.1",
+    "eslint": "^9.7.0",
+    "eslint-import-resolver-typescript": "^3.6.3",
+    "eslint-plugin-boundaries": "^4.2.2",
+    "eslint-plugin-import": "^2.30.0",
+    "globals": "^15.9.0",
+    "happy-dom": "^20.9.0",
+    "typescript": "^5.5.4",
+    "typescript-eslint": "^8.0.0",
+    "vite": "^5.4.0",
+    "vite-plugin-static-copy": "^2",
+    "vitest": "^2.0.5"
+  }
+}