feat: add upload feature

[lyjeileen]

Changes

• Add upload feature
  • Disable send button when there's no text and file input
  • Support add or delete files
  • Have props for maximum file size, maximum file count, supported file types
  • Add loading state
• Add MultimodalInput component
• Add/update tests and stories. Note: Storybook mock add-on doesn't support ProgressEvent, so the progress bar will change from 0 to 100 directly
• Move TextInputProps to types.ts

Screenshots

Multimodal Input Dark mode

Multimodal Input Light mode

With speech-to-text icon

Errors

Uploader

Text Input

Video

Default

Fail to upload

Maximum file count

Only allow pdf and image

Has file size limit

[kaseyvee]

I noticed that if you remove an uploaded item and try to upload the same one, it doesn't work. Same for you when you try to reupload something that failed.