fix: make redirection screen more user friendly

[spaenleh]

When the user comes from graasp.org the url query param is not set.
When the user goes to auth.graasp.org the backend does not provide a url to go to and the redirection screen does not know where to send the user.

To fix this issue:

• change the redirection screen to make it less like "You have to wait, something will happen"
• add a fixed fallback env value that goes to builder.graasp.org in each environnement for when there is nothing

Current Screen:

New Screen:

close #484

[pyphilia]

Thanks for the PR!

[sonarcloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[spaenleh]

@pyphilia I tried with the automatic redirection and I did not really like it. I think it is a bit nicer to have a welcome and click the button. This lets users know that they are logged in. Also this prevents any redirection loops that could be hard to debug if the url param is set to something that makes it look over itself.

[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ NotFoundError: The object can not be found here. insertBefore([native code]) View Issue

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