Add react-toastify to show toast messages when validation fails.
Add validation for project name, video URL, and one of the subtitles, transcoding and thumbnail to successfully generate video thumbnail or transcoding or subtitles.
Create helper file to show toast.
Added * beside project name and video URL, indicating these are required fields.
Add required information text (* Required Information) at top of the form.
[Toast when nothing is input]
[Toast when transcoding, subtitles, thumnail is not checked]
This PR contains changes listed below
[Toast when nothing is input]
[Toast when transcoding, subtitles, thumnail is not checked]
[Required information text]