feat: [WD-13704] Create image from backup file

[Kxiru]

Done

• Added import tarball button as well as associated modal.
• Minor scss changes
• Additional API calls for importing the file and amending image properties.

QA

1. Run the LXD-UI:
   • On the demo server via the link posted by @webteam-app below. This is only available for PRs created by collaborators of the repo. Ask @mas-who or @edlerd for access.
   • With a local copy of this branch, build and run as described in the docs.
2. Perform the following QA steps:
   • Upload a unified tarball image or a split tarball image to LXD-UI by selecting the "Import from Tarball" button on the Image list page.

Screenshots

[webteam-app]

Demo

Jenkins

demos.haus

[mas-who]

Still need to do QA and go through the notification copy. Left some code feedback so long :)

[mas-who]

@Kxiru QA for the importing functionality looks good, I was able to:

• import container and VM split tarballs
• import container and VM unified tarballs

[Kxiru]

I believe this latest version is up to date, @edlerd , @mas-who . Please let me know your thoughts :)

[edlerd]

Thanks for the adjustments, this is now much more straight forward to read.

Addressed

[mas-who]

LGTM, good work! Tested again and everything works well :)

[edlerd]

LGTM, thanks for adding the upload.