CLI-629: vault landing screen floating buttons & CLI-630: deposit/withdraw screen

[mike-dydx]

Links (dYdX Internal Use Only)

Linear Tickets:

• CLI-629: vault landing screen floating buttons
• CLI-630: deposit/withdraw screen
• CLI-631: Draft Deposit/Withdrawal Screen UI

Figma Design: https://www.figma.com/design/mKevZOfE9nj6MZpiolKYW1/dYdX-%E2%80%BA-Mobile?node-id=9752-2618&t=GXuq3xEP3ZtLysMD-4

Description / Intuition

• adds floating deposit/withdrawal buttons to vault landing screen
• adds UI stubs for deposit/withdraw screen
• fyi to review this is still all behind feature flag, undiscoverable without it turned on

Before/After Screenshots or Videos

Before	After

Type of Change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Refactoring or Technical Debt
• [ ] Documentation update
• [ ] Other (please describe: )

[linear[bot]]

CLI-629 vault landing screen floating buttons

[linear[bot]]

CLI-630 deposit/withdraw screen