Initial RUSTLE implementation with UCXL Browser and standardized codes

- Complete UCXL protocol implementation with DHT storage layer
- BZZZ Gateway for peer-to-peer networking and content distribution
- Temporal navigation engine with version control and timeline browsing
- Standardized UCXL error/response codes for Rust, Go, and Python
- React-based UI with multi-tab interface and professional styling
- libp2p integration for distributed hash table operations
- Self-healing network mechanisms and peer management
- Comprehensive IPC commands for Tauri desktop integration

Major Components:
- ucxl-core: Core UCXL protocol and DHT implementation
- BZZZ Gateway: Local subnet peer discovery and content replication
- Temporal Engine: Version control and state reconstruction
- Cross-language standards: Unified error handling across implementations
- Modern UI: Professional React interface with DHT and network monitoring

Standards Compliance:
- UCXL-ERROR-CODES.md and UCXL-RESPONSE-CODES.md v1.0
- Machine-readable error codes with structured payloads
- Client guidance for retry logic and error handling
- Cross-language compatibility with identical APIs

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

ucxl-core/Cargo.toml

@@ -0,0 +1,25 @@
+[package]
+name = "ucxl-core"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+serde = { version = "1.0.219", features = ["derive"] }
+serde_json = "1.0"
+url = "2.5.4"
+tokio = { version = "1.0", features = ["full"] }
+chrono = { version = "0.4", features = ["serde"] }
+sha2 = "0.10"
+hex = "0.4"
+thiserror = "2.0"
+anyhow = "1.0"
+uuid = { version = "1.0", features = ["v4"] }
+async-trait = "0.1"
+libp2p = { version = "0.53", features = ["kad", "tcp", "websocket", "noise", "yamux", "identify", "ping", "dns"] }
+libp2p-kad = "0.47"
+futures = "0.3"
+tracing = "0.1"
+tracing-subscriber = "0.3"
+bincode = "1.3"
+base58 = "0.2"
+rand = "0.8"