Add initial changelog for v0.1.0 release

Author: 0x4543

CHANGELOG.md

@@ -0,0 +1,8 @@
+# Changelog
+
+## v0.1.0 – Initial Release
+- Added wallet generation and signing commands
+- Integrated WalletConnect session support
+- Added PBKDF2 / HKDF key derivation module
+- Implemented walletconnect-status and walletconnect-info commands
+- Updated README with examples and usage details