feat: use kg to update avatar (#2778)

[andre-code]

PR to use kg api to update project's avatar.

Contents of this PR:

• Modification of the updateProject mutation in the projectKgApi to override the project-kg-metadata tag when a project is modified. Avatar should be updated in the Project Header immediately after the change.
• Introduction of a new component for online submit Image input.
• Integration of a storybook for the online submit image input component: Storybook Link.

/deploy renku-graph=development #persist

[RenkuBot]

You can access the deployment of this PR at https://renku-ci-ui-2806.dev.renku.ch

[andre-code]

Thank you for your review, @lorenzo-cavazzi. I have updated the input helper text to display a more accurate message regarding the limits of the image to upload compared to the image after cropping. It's possible that the calculation of the file size after crop and resize could be greater than the expected final size, and this message reflects that accurately.

I have also improved the parsing of error messages when there is an issue with changing the image. With these two changes, it now looks like this:

[ciyer]

Overall, this looks very good! 🎉 I'm still doing some manual testing, but I have a couple of small suggestions about the code.

changes implemented, reviewer not available

[RenkuBot]

Tearing down the temporary RenkuLab deplyoment for this PR.