feat: set width of chunk text to 100% and add Skeleton to Preview of document and remove react-pdf (#94)

* feat: remove react-pdf

* feat: add Skeleton to Preview of document

* feat: set width of chunk text to 100%

web/package.json

@@ -27,7 +27,6 @@
     "react-i18next": "^14.0.0",
     "react-infinite-scroll-component": "^6.1.0",
     "react-markdown": "^9.0.1",
-    "react-pdf": "^7.7.1",
     "react-pdf-highlighter": "^6.1.0",
     "react-string-replace": "^1.1.1",
     "umi": "^4.0.90",