feat: dashboard dynamic

[0xshikhar]

PR-Codex overview

This PR introduces new features and improvements to the project, including updates to dependencies, adjustments in component styling, and enhancements to transaction handling and state management.

Detailed summary

• Added NEXT_PUBLIC_ENABLE_TESTNETS=true to .env.
• Updated tailwind-merge version in package.json.
• Modified getLogo function in src/lib/utils.ts to remove support for .jpeg.
• Commented out the background style in src/components/wallet/Connect.tsx.
• Adjusted class names for spacing in src/components/wallet/Wallet.tsx.
• Refined the Sidebar component's button styling in src/components/Sidebar.tsx.
• Introduced new state variables and transaction logic in src/app/page.tsx.

The following files were skipped due to too many changes: package-lock.json, yarn.lock

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