Improve styling of PasskeyList

[incorbador]

Why

We made design improvements to our PasskeyList component. They can be found here.

Details about the tags:

• Synced: Should be set when backupState == true
• Hybrid: Should be set when transport contains "hybrid"
• Seen on this device: For this functionality we need a bit more info => let's skip this in the initial version (we will add it though so please make sure this it's possible to add more tags)

Acceptance criteria

• PasskeyList works in light and darkmode
• PasskeyList works on Desktop (Windows and Mac) and on Mobile (iOS, Android)
• Creating and deleting a passkey is still possible

[incorbador]

The implementation of "Seen on this device" depends on #327 => I will create a follow up ticket for the required updates to the components (then we can complete this ticket here independent of the backend).