feat: support entropy input formats

[Drincann]

PR Type

Enhancement, Tests

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Description

• Add prefixed entropy input support

• Support hex entropy during wallet creation

• Display mnemonic entropy in wallet show

• Cover entropy flows with E2E tests

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Diagram Walkthrough

flowchart LR
  create["wallet create"]
  parse["Parse 0x/0b entropy"]
  mnemonic["Generate mnemonic"]
  show["wallet show --entropy"]
  hex["Display entropy hex"]

  create -- "accepts --entropy" --> parse
  parse -- "feeds buffer" --> mnemonic
  show -- "converts mnemonic" --> hex

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File Walkthrough

	Relevant files
Tests	wallet-lifecycle.test.ts Add E2E coverage for entropy formats                                          tests/e2e/wallet-lifecycle.test.ts Updates entropy creation tests to use --entropy. Adds binary entropy coverage with 0b prefix. Adds hex entropy coverage with 0x prefix. Verifies wallet show --entropy outputs hex entropy. +25/-4
Enhancement	create.mts Support formatted entropy for wallet creation                        src/cli/commands/wallet/create.mts Replaces --entropy-bits with --entropy. Accepts entropy in 0x... or 0b... format. Converts validated entropy into a mnemonic buffer. Adds validation and trimming for formatted entropy. +35/-13  show.mts Add entropy display to wallet show                                              src/cli/commands/wallet/show.mts Adds --entropy option for wallet details. Prints entropy as 0x-prefixed hexadecimal. Supports entropy display for wallet references. Adds typed options for show command handling. +12/-3    mnemonic.mts Expose mnemonic entropy conversion helper                                src/crypto/mnemonic.mts Adds entropyHexOf helper. Converts mnemonic words back to BIP39 entropy. Exposes entropy conversion for CLI display. +4/-0

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