Add image upload UI

[iseabock]

Motivation and Context

This PR adds an ability to upload an image with a prompt.

Description

With OYD

Without OYD

Contribution Checklist

• I have built and tested the code locally and in a deployed app
• For frontend changes, I have pulled the latest code from main, built the frontend, and committed all static files.
• This is a change for all users of this app. No code or asset is specific to my use case or my organization.
• I didn't break any existing functionality 😄

[ukiguy]

So my upload image loads during page load but disappears after 1/2 second once the page finishes loading. Are there are prerequires to make this feature work?

[sydneybeckcook]

So does this feature not work if you are connected to Azure AI Search?

[fredparadis]

So my upload image loads during page load but disappears after 1/2 second once the page finishes loading. Are there are prerequires to make this feature work?

Same here 👍

[dchmurec]

So my upload image loads during page load but disappears after 1/2 second once the page finishes loading. Are there are prerequires to make this feature work?

If you leave the environment variable DATASOURCE_TYPE empty, the upload image icon remains in the chat without disappearing. At least what I have tested and it works to chat about images I upload.