chore: release @zkp2p/cash 0.5.2

[ADWilkinson]

Summary

• release the merged @zkp2p/sdk 0.14.0 dependency update from chore(deps): bump @zkp2p/sdk to 0.14.0 #73
• advance the Peer Cash patch version from 0.5.1 to 0.5.2

Verification

• bun run typecheck
• bun run lint
• bun run format:check
• bun run test: 338 passed
• bun run audit: no production vulnerabilities
• bun run build
• bun run pack:check: package content, ESM/CJS runtime, NodeNext, and classic-resolver smoke checks passed

Publish only from the clean merged release commit.