chore: remove bitcoinjs-lib from Bitcoin adapter (#5368)

Co-authored-by: Copilot <[email protected]>

Author: tomiir

.changeset/strict-wombats-dress.md

@@ -0,0 +1,5 @@
+---
+'@reown/appkit-adapter-bitcoin': patch
+---
+
+Removes unused bitcoinjs-lib dependency

.cursor/rules/appkit-monorepo.mdc

@@ -114,7 +114,7 @@ This document orients Cursor to the structure, relationships, and common pattern
 ### State, Data, and External SDKs
 
 - State management is uniform with `valtio`. Controllers own reactive state; UI subscribes.
-- EVM stack uses `viem` and `wagmi` (in adapters). Solana uses `@solana/web3.js` and wallet-standard libs. Bitcoin uses `bitcoinjs-lib`, `sats-connect`.
+- EVM stack uses `viem` and `wagmi` (in adapters). Solana uses `@solana/web3.js` and wallet-standard libs. Bitcoin uses `wallet-standard` and `sats-connect`.
 - WalletConnect v2 is integrated via `@walletconnect/universal-provider`. Keep provider interactions isolated in `controllers`/`utils`/adapters.
 
 ### Testing Conventions

packages/adapters/bitcoin/package.json

@@ -35,7 +35,6 @@
     "@wallet-standard/app": "1.1.0",
     "@wallet-standard/base": "1.1.0",
     "@walletconnect/universal-provider": "2.23.0",
-    "bitcoinjs-lib": "6.1.7",
     "sats-connect": "3.5.0"
   },
   "devDependencies": {