!WIP feat: add selectable chain connect modal

[RyukTheCoder]

Summary

Added selectable chain connect modal.

Fixes # rf-1373

How did you test this change?

When you try to connect phantom wallet, a modal should be displayed to select desired chains to connect.

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• Implemented a user interface (UI) change, referencing our Figma design to ensure pixel-perfect precision.

[yeager-eren]

Thanks.
I used the UI and changed it a bit in this PR: #623 (4f70cff)

Closing for now.