Added download functionality.

Needs to be tested in native builds (ios/android)

client-ionic/package.json

@@ -20,6 +20,7 @@
     "@stirling-pdf/shared-operations": "*",
     "@types/react-router": "^5.1.20",
     "@types/react-router-dom": "^5.3.3",
+    "downloadjs": "^1.4.7",
     "ionicons": "^7.0.0",
     "pdf-lib": "^1.17.1",
     "react": "^18.2.0",
@@ -31,6 +32,7 @@
     "@testing-library/jest-dom": "^5.16.5",
     "@testing-library/react": "^14.0.0",
     "@testing-library/user-event": "^14.4.3",
+    "@types/downloadjs": "^1.4.5",
     "@types/react": "^18.0.27",
     "@types/react-dom": "^18.0.10",
     "@vitejs/plugin-legacy": "^4.0.2",