feat: implement user-friendly transaction error messages

[radik878]

Replace verbose blockchain transaction error messages with concise, localized user-friendly alternatives.

Changes

• Add centralized error formatting utility in utils/txErrorMessages.ts
• Map common wallet/provider errors to readable messages:
  • User rejection → "Transaction canceled."
  • Insufficient funds → "Insufficient funds to complete this transaction."
  • Gas issues → "Replacement fee too low; try again with higher gas."
  • Contract reverts → Contextual messages (e.g., "You have already voted")
• Integrate error formatter across key transaction flows:
  • Vote page (queue/execute/cancel proposals)
  • Candidate page (cancel candidates)
  • Create/Edit Candidate pages (proposal submission)
  • Edit Proposal pages (updates and transactions)
  • VoteModal (voting failures)
  • Bid component (auction transactions)

Benefits

• Improves user experience by showing clear, actionable error messages
• Reduces confusion from technical blockchain error strings
• Maintains i18n support with Lingui macros
• Centralizes error handling for consistent messaging

Fixes #1062

[vercel]

@radik878 is attempting to deploy a commit to the Nouns Team on Vercel.

A member of the Team first needs to authorize it.

[volkyeth]

Thanks a lot for this!

We're in the middle of a migration to nextjs (#1260), so I'll wait until that is done so we can rebase your work