Added skeleton loader

Author: SundeepChand

package-lock.json

@@ -22,6 +22,7 @@
     "react-hook-form": "^6.3.2",
     "react-i18next": "^11.5.0",
     "react-image-gallery": "^1.2.5",
+    "react-loading-skeleton": "^2.2.0",
     "react-markdown": "^5.0.2",
     "react-markdown-editor-lite": "^1.2.4",
     "react-promise-tracker": "^2.1.0",