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>

src/index.css

@@ -0,0 +1,68 @@
+:root {
+  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+
+  color-scheme: light dark;
+  color: rgba(255, 255, 255, 0.87);
+  background-color: #242424;
+
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+a {
+  font-weight: 500;
+  color: #646cff;
+  text-decoration: inherit;
+}
+a:hover {
+  color: #535bf2;
+}
+
+body {
+  margin: 0;
+  display: flex;
+  place-items: center;
+  min-width: 320px;
+  min-height: 100vh;
+}
+
+h1 {
+  font-size: 3.2em;
+  line-height: 1.1;
+}
+
+button {
+  border-radius: 8px;
+  border: 1px solid transparent;
+  padding: 0.6em 1.2em;
+  font-size: 1em;
+  font-weight: 500;
+  font-family: inherit;
+  background-color: #1a1a1a;
+  cursor: pointer;
+  transition: border-color 0.25s;
+}
+button:hover {
+  border-color: #646cff;
+}
+button:focus,
+button:focus-visible {
+  outline: 4px auto -webkit-focus-ring-color;
+}
+
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #213547;
+    background-color: #ffffff;
+  }
+  a:hover {
+    color: #747bff;
+  }
+  button {
+    background-color: #f9f9f9;
+  }
+}