feat: introduce hero_vault

Cargo.toml

@@ -28,6 +28,15 @@ rhai = { version = "1.12.0", features = ["sync"] } # Embedded scripting language
 rand = "0.8.5"     # Random number generation
 clap = "2.33"      # Command-line argument parsing
 
+# Crypto dependencies
+base64 = "0.21.0"  # Base64 encoding/decoding
+k256 = { version = "0.13.1", features = ["ecdsa"] } # Elliptic curve cryptography
+once_cell = "1.18.0" # Lazy static initialization
+sha2 = "0.10.7"    # SHA-2 hash functions
+chacha20poly1305 = "0.10.1" # ChaCha20Poly1305 AEAD cipher
+ethers = { version = "2.0.7", features = ["legacy"] } # Ethereum library
+dirs = "5.0.1"     # Directory paths
+
 # Optional features for specific OS functionality
 [target.'cfg(unix)'.dependencies]
 nix = "0.26"       # Unix-specific functionality