feat: export createNamedDescriptorWithSignature

Ticket: BTC-000

Author: lcovar

modules/abstract-utxo/src/descriptor/index.ts

@@ -1,6 +1,6 @@
 export { Miniscript, Descriptor } from '@bitgo/wasm-miniscript';
 export { assertDescriptorWalletAddress } from './assertDescriptorWalletAddress';
-export { NamedDescriptor } from './NamedDescriptor';
+export { NamedDescriptor, createNamedDescriptorWithSignature } from './NamedDescriptor';
 export { isDescriptorWallet, getDescriptorMapFromWallet } from './descriptorWallet';
 export { getPolicyForEnv } from './validatePolicy';
 export * as createWallet from './createWallet';