feature(unlock-app): Implement combobox Component for improved UX

[0xTxbi]

Description

This PR introduces changes that replace select elements with our new combobox component across the unlock-app. It enhances usability, especially when dealing with long or complex option lists, by providing dynamic search and quick filtering capabilities.

Flow

Loom

Checklist:

• 1 PR, 1 purpose: my Pull Request applies to a single purpose
• [] I have commented my code, particularly in hard-to-understand areas
• I have updated the docs to reflect my changes if applicable
• I have added tests (and stories for frontend components) that prove my fix is effective or that my feature works
• I have performed a self-review of my own code
• If my code involves visual changes, I am adding applicable screenshots to this thread