Site redesign + migration to testnet-4 (#962)

Also fixes the devShell for darwin

- fix(devShell): make devShell work on darwin
- feat(site): wip contrasty design
- feat(site): add investors to lander
- feat(site): 3d text effect
- fix(site): sizing fixes
- feat(site): style explore button
- fix(site): backed by sizing fixes
- feat(site): expand grid to footer
- feat(site): add ETH <-> IBC section
- feat(site): improve responsiveness and spacing
- fix(site): announcement link
- feat(blog): add seed round announcement
- feat(site): link to seed raise article
- fix(site): add migration in process warning
- fix(site): process -> progress
- fix(site): log transfer errors
- fix(site): delete warningbox and change testnet-3 to testnet-4
- feat(site): add updated ABIs
- feat(site): upgrade to `union-testnet-4`
- fix: use correct encoding for account
- fix(site): text fixes
- fix(site): only show spinner when the user has started the transfer


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
  - Search functionality now available across the app.
  - New warning box component introduced for important alerts.
  - Enhanced footer and header design for better user experience.
- Terminal container now features a more distinct border and shadow for
improved visibility.
  - Blog layout updated for a more engaging reading experience.

- **Enhancements**
  - Updated chain ID and addresses for a smoother transaction process.
  - Improved visual styling with new color schemes and grid effects.
  - Refined text capitalization and font weight for better readability.

- **Bug Fixes**
- Fixed issues with transfer functions to ensure reliable cross-chain
transactions.
  - Corrected sorting of blog posts by date for accurate display.

- **Documentation**
- Updated blog content to reflect the latest network changes and seed
funding round details.

- **Style**
- Adjusted styles across various components for a more cohesive look and
feel.

- **Chores**
  - Cleaned up imports and constants for better code maintenance.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->