Add ability for user to upload / update the app's image

[johbaxter]

We are dependent on the backend ticket at the bottom of this message.

On the app detail page: http://localhost:9090/semoss-ui/packages/client/dist/#/app/7d2fbc76-5ffa-42ea-90fe-2348108b9919/detail

Edit app details modal add image picker to upload a new project image

The endpoint to update the app image should be in ImageUploader.java

But it may need modifications, coordinate with the backend dev assigned to:
SEMOSS/Monolith#125

[anurag91jain]

@punithkv4334 are you working on this ticket?