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-lock.json

@@ -55,6 +55,7 @@
         "@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",
@@ -2195,6 +2196,15 @@
         "@types/range-parser": "*"
       }
     },
+    "node_modules/@types/fluent-ffmpeg": {
+      "version": "2.1.20",
+      "resolved": "https://registry.npmjs.org/@types/fluent-ffmpeg/-/fluent-ffmpeg-2.1.20.tgz",
+      "integrity": "sha512-B+OvhCdJ3LgEq2PhvWNOiB/EfwnXLElfMCgc4Z1K5zXgSfo9I6uGKwR/lqmNPFQuebNnes7re3gqkV77SyypLg==",
+      "dev": true,
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/graceful-fs": {
       "version": "4.1.5",
       "resolved": "https://registry.npmjs.org/@types/graceful-fs/-/graceful-fs-4.1.5.tgz",
@@ -12803,6 +12813,15 @@
         "@types/range-parser": "*"
       }
     },
+    "@types/fluent-ffmpeg": {
+      "version": "2.1.20",
+      "resolved": "https://registry.npmjs.org/@types/fluent-ffmpeg/-/fluent-ffmpeg-2.1.20.tgz",
+      "integrity": "sha512-B+OvhCdJ3LgEq2PhvWNOiB/EfwnXLElfMCgc4Z1K5zXgSfo9I6uGKwR/lqmNPFQuebNnes7re3gqkV77SyypLg==",
+      "dev": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@types/graceful-fs": {
       "version": "4.1.5",
       "resolved": "https://registry.npmjs.org/@types/graceful-fs/-/graceful-fs-4.1.5.tgz",