Add copyToClipboard to bitcore-cli

[kajoseph]

Description

Copying public keys and invite codes during the TSS wallet setup can be cumbersome since the @clack/prompts cli interface adds formatting for multi-line outputs. This PR adds a copyToClipboard utility function that's implemented in the TSS wallet creation flow.

Changelog

• Added copyToClipboard utility + integrated into TSS wallet creation flow
• Fixed a few minor bugs:
  • TSS error handling
  • Bold text resetting
  • Null coalescing if txp.actions doesn't exist
  • Better --help info: removed --list option (which didn't work)

Testing Notes

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Checklist

• I have read CONTRIBUTING.md and verified that this PR follows the guidelines and requirements outlined in it.

[Copilot]

Pull request overview

This PR improves the bitcore-cli Threshold Signature (TSS) wallet setup UX by adding a cross-platform copyToClipboard utility and integrating “Copy to clipboard” actions into TSS create/join flows, alongside a handful of CLI robustness tweaks (formatting, error handling, help/options, and proposal/transaction parameter handling).

Changes:

• Added Utils.copyToClipboard() and integrated “Copy to clipboard” actions into TSS create/join prompts.
• Adjusted CLI formatting and error logging (bold/dim reset handling; clearer TSS signing error log).
• Hardened some command flows (tx proposal actions optionality; transaction fee/tag handling; CLI help/usage tweaks) and updated tests accordingly.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
packages/bitcore-cli/test/create.test.ts	Updates TSS flow tests to account for the new clipboard option in prompt navigation.
packages/bitcore-cli/src/utils.ts	Adds clipboard support and improves ANSI formatting helpers for bold/dim interactions.
packages/bitcore-cli/src/tss.ts	Updates TSS signing error logging behavior.
packages/bitcore-cli/src/prompts.ts	Adjusts bold rendering in a dimmed prompt context.
packages/bitcore-cli/src/commands/txproposals.ts	Makes txp action checks more null-safe (but contains a new optional-chaining .length bug).
packages/bitcore-cli/src/commands/transaction.ts	Tightens destination tag validation and adjusts fee/nonce handling.
packages/bitcore-cli/src/commands/join/joinThresholdSig.ts	Adds “Copy to clipboard” loop to the join flow for sharing the auth pubkey.
packages/bitcore-cli/src/commands/create/createThresholdSig.ts	Adds “Copy to clipboard” loop to the create flow for sharing join codes.
packages/bitcore-cli/src/cli.ts	Updates help/usage text and removes non-working --list option in favor of walletName === 'list'.

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