Enhance UI/UX for Credential Selection Popup

[gkatrakazas]

This PR introduces several enhancements to the UI/UX of the credential selection popup within the presentation module. The current design has been confusing for users, particularly in terms of selecting credentials. These changes aim to improve user interaction and clarity throughout the credential selection process.

Changes

1. Opacity Adjustment for Credential Cards

   • Updated the default state of credential cards to have lower opacity. When a card is selected by the user, its opacity increases. This visual cue helps indicate which credentials are actively selected, thereby enhancing user understanding and interaction.

2. Introduction of Action Button

   • Added 'Previous and 'Next/Send' buttons at the bottom-right of the popup. These buttons serves as a clear call to actions for users to proceed after selecting their credentials.

3. Progression Step Bar

   • Implemented a step bar at the top of the popup. This bar indicates the number of credentials that need to be selected to proceed. By showing progress and the remaining steps, the step bar helps set user expectations and provides a visual representation of their progress through the credential selection process.