Added button to save labels as png images

Resolves #80
Resolves #348

client/package-lock.json

@@ -24,6 +24,7 @@
         "antd": "^5.20.0",
         "axios": "^1.7.3",
         "flag-icons": "^7.2.3",
+        "html-to-image": "^1.11.11",
         "i18next": "^23.12.2",
         "i18next-browser-languagedetector": "^8.0.0",
         "i18next-http-backend": "^2.5.2",
@@ -5497,6 +5498,11 @@
         "void-elements": "3.1.0"
       }
     },
+    "node_modules/html-to-image": {
+      "version": "1.11.11",
+      "resolved": "https://registry.npmjs.org/html-to-image/-/html-to-image-1.11.11.tgz",
+      "integrity": "sha512-9gux8QhvjRO/erSnDPv28noDZcPZmYE7e1vFsBLKLlRlKDSqNJYebj6Qz1TGd5lsRV+X+xYyjCKjuZdABinWjA=="
+    },
     "node_modules/htmlparser2": {
       "version": "8.0.2",
       "resolved": "https://registry.npmjs.org/htmlparser2/-/htmlparser2-8.0.2.tgz",