Feature - Add upload functionality on Web (#231)

* Added file selector

* Extract metadata to upload files to the web

* Added request for uploading

* Generate jpeg/Webp thumbnail for asset uploaded without thumbnail data

* Added generating thumbnail for video and WebSocket broadcast after thumbnail is generated

* Added video length extraction

* Added Uploading Panel

* Added upload progress store and styling the uploaded asset

* Added condition to only show upload panel when there is upload in progress

* Remove asset from the upload list after successfully uploading

* Added WebSocket to listen to upload event on the web

* Added mechanism to check for existing assets before uploading on the web

* Added test workflow

* Update readme

server/package.json

@@ -68,6 +68,7 @@
     "@types/bull": "^3.15.7",
     "@types/cron": "^2.0.0",
     "@types/express": "^4.17.13",
+    "@types/fluent-ffmpeg": "^2.1.20",
     "@types/imagemin": "^8.0.0",
     "@types/jest": "27.0.2",
     "@types/lodash": "^4.14.178",