Show spinners for 'gdk install'

What does this merge request do and why?

This MR adds spinners to gdk install, just like we have for gdk update. Following this, we can parallelize the GDK installation.

Before	After
Screen_Recording_2024-11-05_at_18.22.11	Screen_Recording_2024-11-05_at_18.22.53

How to set up and validate locally

1. Run gdk install
2. See spinners 😊

Impacted categories

The following categories relate to this merge request:

• gdk-reliability - e.g. When a GDK action fails to complete.
• gdk-usability - e.g. Improvements or suggestions around how the GDK functions.
• gdk-performance - e.g. When a GDK action is slow or times out.

Merge request checklist

• This change is backward compatible. If not, please include steps to communicate to our users.
• Tests added for new functionality. If not, please raise an issue to follow-up.
• Documentation added/updated, if needed.
• Announcement added, if change is notable.
• gdk doctor test added, if needed.
• Add the ~highlight label if this MR should be included in the CHANGELOG.md.