fix: cli: Wrap error in wallet sign

[rjan90]

Related Issues

Closes: #7919

Proposed Changes

Wrap error when a msig is trying to sign a msg, explaining that msig messages needs to propose & approve.

Additional Info

When trying to sign with a msig, error is now wrapped as:

lotus wallet sign t2pgqal7cetyqb6thbkb6s4nlbx3to5mm4azc43si 3fa85f6457174562b3fc2c963f66afa6
ERROR: multisig is an actor account that doesn’t have keys to sign transactions. To send a message with a multisig, signers of the multisig need to propose and approve transactions.

Checklist

Before you mark the PR ready for review, please make sure that:

• Commits have a clear commit message.
• PR title is in the form of of <PR type>: <area>: <change being made>
  • example: fix: mempool: Introduce a cache for valid signatures
  • PR type: fix, feat, build, chore, ci, docs, perf, refactor, revert, style, test
  • area, e.g. api, chain, state, market, mempool, multisig, networking, paych, proving, sealing, wallet, deps
• If the PR affects users (e.g., new feature, bug fix, system requirements change), update the CHANGELOG.md and add details to the UNRELEASED section.
• New features have usage guidelines and / or documentation updates in
  • Lotus Documentation
  • Discussion Tutorials
• Tests exist for new functionality or change in behavior
• CI is green