feat: add WIP-103 proof verification to CLI

[paolodamico]

Adds WIP-103 proof verification to the CLI.

---

Note

Medium Risk
Adds a new CLI path for decoding and verifying ownership proofs (base64url+CBOR) and introduces new crypto dependencies, which could affect verification correctness and error handling. Also tweaks dev build profiles for ProveKit crates, which may change debug-time behavior.

Overview
Adds a new walletkit proof verify-ownership subcommand that reads a base64url-encoded CBOR OwnershipProof, parses --nonce/--sub field elements, runs verify_ownership_proof, and reports results in both human and JSON modes (exiting non-zero on failure).

Updates CLI output to use TTY-aware colored PASS/FAIL labels via new helpers in output.rs, and extends dependencies/build settings (adds world-id-proof + ciborium; pins ProveKit dev debug-assertions=false to avoid non-serialized debug-only proof fields; pulls in provekit-verifier in the lockfile).

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[paolodamico]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Bravo.

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