⬆️ Update to Angular 16

[steffinchen]

Summary

• Angular 15 -> Angular 16
• Migrate to standalone components
• add required: true to @Input() where sensible
• Upgrade all other npm packages
• Format everything with prettier

Closing https://github.com/appuio/cloud-portal/issues/548

Checklist

• [x] Categorize the PR by setting a good title and adding one of the labels: bug, enhancement, documentation, change, breaking, as they show up in the changelog
• [x] Update tests.
• [x] Link this PR to related issues.

[github-actions[bot]]

🚀 Preview deployment active

App URL	https://portal-pr-549-appuio-control-api-preview.apps.cloudscale-lpg-2.appuio.cloud
Revision	26368a2c840fc5683f5e1c9f8b955fec2ff336df
Helm release	appuio-control-api-preview/portal-pr-549
Cluster	https://api.cloudscale-lpg-2.appuio.cloud:6443

To uninstall this deployment, close or merge this PR.

[github-actions[bot]]

✔️ Preview deployment uninstalled

Helm release	appuio-control-api-preview/portal-pr-549
Cluster	https://api.cloudscale-lpg-2.appuio.cloud:6443