feat: add shared Toolbox header and themes

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pdf-tools",
-  "version": "0.3.4",
+  "version": "0.4.0",
   "private": true,
   "license": "AGPL-3.0-only",
   "type": "module",
@@ -23,8 +23,8 @@
     "check": "npm run manifest:check && npm run typecheck && npm run lint && npm run test && npm run build && npm run test:toolbox"
   },
   "dependencies": {
-    "@add-ideas/toolbox-contract": "^0.1.0",
-    "@add-ideas/toolbox-shell-react": "^0.1.0",
+    "@add-ideas/toolbox-contract": "^0.2.0",
+    "@add-ideas/toolbox-shell-react": "^0.2.0",
     "fflate": "^0.8.3",
     "pdf-lib": "^1.17.1",
     "pdfjs-dist": "^5.7.284",
@@ -32,7 +32,7 @@
     "react-dom": "^19.2.6"
   },
   "devDependencies": {
-    "@add-ideas/toolbox-testkit": "^0.1.0",
+    "@add-ideas/toolbox-testkit": "^0.2.0",
     "@eslint/js": "^10.0.1",
     "@testing-library/react": "^16.3.2",
     "@testing-library/user-event": "^14.6.1",