Feature/804 - addition of thumbnail image to repositories

[D-GopalKrishna]

Task description:

• BE for the file upload in the Repositories
• Update the openapi spec
• Create a common FE for thumbnail upload - ThumbnailUploadArea - for repo and workspace
• show different icons in repo based on if thumbnail exists or is - dandi, figshare, or github.
• A script to update the api definitions and also update the inner openapi.yaml file from api/openapi.yaml.

Short video:

2024-01-17.16-34-37.mp4

[filippomc]

LGTM

[D-GopalKrishna]

To add the thumbnail column in the osbrepository table. WE alter the table with the following query:
ALTER TABLE osbrepository ADD COLUMN thumbnail VARCHAR(255);

the thumbnail string saved is of the format - repositories/1/thumbnail.bin; so VARCHAR(255) is good.