Wallet: non-helpful error messages when receiving from the "wrong" mintUrl

[Egge21M]

When receiving proofs from mint a on a wallet instance connected to mint b, receive() throws a not so helpful error.

/Users/egge/Projects/btcplusplus24-code/cashu.js:3188
          var _this = _super.call(this, message) || this;
                             ^

Error: '009a1f293253e41e'
    at new HttpResponseError2 (/Users/egge/Projects/btcplusplus24-code/cashu.js:3188:30)
    at /Users/egge/Projects/btcplusplus24-code/cashu.js:3347:21
    at step (/Users/egge/Projects/btcplusplus24-code/cashu.js:3299:21)
    at Object.next (/Users/egge/Projects/btcplusplus24-code/cashu.js:3251:18)
    at fulfilled (/Users/egge/Projects/btcplusplus24-code/cashu.js:3223:28)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5) {
  status: 400
}

receive should probably compare the keysets and if it does not match it should error.
We could also introduce a general utility that would allow you to receive from unknown mints, by parsing the mintUrl from the token.