Basic UI for triggering the transactions

[dankelleher]

• Clean up polygon wallet connection button, and move to the page where it is first needed (step 3)
• Unify Deposit and Swap steps
• Add CO2 price details
• Move entire UI into a responsive centered box instead of full-size
• Add title & Sunrise logo
• Restyle with sunrise colours
• Spinner and wait info for Bridge txes
• Automatically trigger Next or disable / enable buttons and highlight next when ready
• UI to show NFT
• UI to select / manage retirement project
• Toucan logo
• Handle pending polygon txes (spinner when tx is pending, only show success message once confirmed)
• Handle emptying the state once bridging is done
• Add dark theme