Assign different address to sign for a PSBT

[LRam10]

Objective:

• Use LeatherProvider API to create and sign a PSBT for a Bitcoin transaction, signing index 0 with the ordinal address (for an inscription) and the remaining inputs with a BTC payment address or having a sendInscription function.
• Ensure that when broadcasting the PSBT, the API returns both the new hex value and the transaction ID.

Xverse allows singing inputs as follows:

payload: {
      network: {
            type: 'Mainnet'
                },
              message: 'Sign Transaction',
              psbtBase64: psbt,
              broadcast: true,
               inputsToSign: [ {
               address:ordinal_address,
                 signingIndexes:[0] //index 0 for inscription
                 },
                {
               address: .payment_address,
               signingIndexes: inputs,
               }],
  }