Add witness utxo to segwit psbt inputs

[DeRauk]

Summary & Motivation

This adds a witness utxo to segwit psbt inputs for more validation in the parser.

How I Tested These Changes

Locally

➜  with-bitcoin git:(derauk/testing) ✗ pnpm with-policy

> @turnkey/example-with-bitcoin@0.2.0 with-policy /Users/derauk/tkhq/code/sdk/examples/with-bitcoin
> tsx src/signBtcTxWithPolicy.ts

(node:78284) ExperimentalWarning: `--experimental-loader` may be removed in the future; instead use `register()`:
--import 'data:text/javascript,import { register } from "node:module"; import { pathToFileURL } from "node:url"; register("file%3A///Users/derauk/tkhq/code/sdk/node_modules/.pnpm/tsx%403.12.7/node_modules/tsx/dist/loader.js", pathToFileURL("./"));'
(Use `node --trace-warnings ...` to show where the warning was created)
(node:78284) UnsupportedWarning: `globalPreload` has been removed; use `initialize` instead.
(Use `node --trace-warnings ...` to show where the warning was created)
✅ Loaded configuration
-> Source address: tb1qmua7s9nua3v9e0e7ssf0rxrjvzrphhnlas6k30
-> Inferred address type: TestnetP2WPKH
Fetching UTXOs...
✔ select UTXOS to spend › 1000 sats (tx # f901114f70e063a7444656dbffbed543bf308664610b56c6f18877ac3a8ea502 @ 0)
✔ Destination BTC address … tb1qkud94hma5vm6de4uedddyqerdnny7dza4wvwkt
✅ Fee estimate: 180 sats
✔ How much to you want to send to tb1qkud94hma5vm6de4uedddyqerdnny7dza4wvwkt? (max: 820 sats, the rest will go back to the source address as change) … 820
✔ change amount going back to your source address will be 0. Looks good? … yes
✔ Enter receiving address to ALLOW signing via policy (to test failure case, enter something other than the receiving address that you entered while creating your PSBT): … tb1qkud94hma5vm6de4uedddyqerdnny7dza4wvwkt
New policy created!
- Name: Bitcoin allow transfer to 'tb1qkud94hma5vm6de4uedddyqerdnny7dza4wvwkt'
- Policy ID: 6ef9853e-4e2a-4f48-891a-d5aa7ee03bb0
- Effect: EFFECT_ALLOW
- Consensus: approvers.count() == 1
- Condition: bitcoin.tx.outputs.count() == 2 && bitcoin.tx.outputs.all(o, o.address in ['tb1qkud94hma5vm6de4uedddyqerdnny7dza4wvwkt','tb1qmua7s9nua3v9e0e7ssf0rxrjvzrphhnlas6k30'])

New user created!
- Name: new-bitcoin-user
- User ID: b7148c73-e19e-4810-926d-86463dbe4337

✅ Transaction signed! To broadcast it, copy and paste the hex payload to https://mempool.space/testnet/tx/push

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