fix: use generic NUT-17 subscription kinds

[callebtc]

Summary

• switch wallet websocket subscriptions to the new generic mint_quote and melt_quote kinds
• keep the old bolt11-specific kinds in the public RPC type as deprecated aliases for backwards compatibility
• update NUT-17 test fixtures and websocket tests to advertise and expect the new command strings

Testing

• npx vitest run --project node test/transport/WSConnection.test.ts test/wallet/WalletEvents.test.ts test/wallet/wallet.node.test.ts
• npx vitest run --project node test/wallet/bolt12.test.ts test/transport/request.node.test.ts

Refs: cashubtc/nuts#372

[robwoodgate]

Closing in favour of #668, which is exactly the same patch, just applied cleanly to current state of main.

The PR above was based on a very old state of main, making rebase more difficult than a new PR.