feat: add marketplace metrics, privacy features, and service registry endpoints

- Add Prometheus metrics for marketplace API throughput and error rates with new dashboard panels
- Implement confidential transaction models with encryption support and access control
- Add key management system with registration, rotation, and audit logging
- Create services and registry routers for service discovery and management
- Integrate ZK proof generation for privacy-preserving receipts
- Add metrics instru

docs/user/getting-started/introduction.md

@@ -0,0 +1,93 @@
+---
+title: Introduction to AITBC
+description: Learn about the AI Trusted Blockchain Computing platform
+---
+
+# Introduction to AITBC
+
+AITBC (AI Trusted Blockchain Computing) is a revolutionary platform that combines artificial intelligence with blockchain technology to create a secure, transparent, and efficient ecosystem for AI computations.
+
+## What is AITBC?
+
+AITBC enables:
+- **Verifiable AI Computations**: Execute AI workloads on the blockchain with cryptographic proofs
+- **Decentralized Marketplace**: Connect AI service providers with consumers in a trustless environment
+- **Fair Compensation**: Ensure fair payment for computational resources through smart contracts
+- **Privacy Preservation**: Maintain data privacy while enabling verification
+
+## Key Features
+
+### 🔒 Trust & Security
+- Cryptographic proofs of computation
+- Immutable audit trails
+- Secure multi-party computation
+
+### ⚡ Performance
+- High-throughput consensus
+- GPU-accelerated computations
+- Optimized for AI workloads
+
+### 💰 Economics
+- Token-based incentives
+- Dynamic pricing
+- Staking rewards
+
+### 🌐 Accessibility
+- Easy-to-use APIs
+- SDKs for major languages
+- No blockchain expertise required
+
+## Use Cases
+
+### AI Service Providers
+- Monetize AI models
+- Reach global customers
+- Automated payments
+
+### Data Scientists
+- Access compute resources
+- Verify results
+- Collaborate securely
+
+### Enterprises
+- Private AI deployments
+- Compliance tracking
+- Cost optimization
+
+### Developers
+- Build AI dApps
+- Integrate blockchain
+- Create new services
+
+## Architecture
+
+```mermaid
+graph LR
+    A[Users] --> B[Coordinator API]
+    B --> C[Marketplace]
+    B --> D[Blockchain]
+    D --> E[Miners]
+    E --> F[AI Models]
+    G[Wallets] --> B
+    H[Explorer] --> D
+```
+
+## Getting Started
+
+Ready to dive in? Check out our [Quickstart Guide](quickstart.md) to get up and running in minutes.
+
+## Learn More
+
+- [Architecture Details](architecture.md)
+- [Installation Guide](installation.md)
+- [Developer Documentation](../developer-guide/)
+- [API Reference](../api/)
+
+## Community
+
+Join our community to learn, share, and collaborate:
+
+- [Discord](https://discord.gg/aitbc)
+- [GitHub](https://github.com/aitbc)
+- [Blog](https://blog.aitbc.io)
+- [Twitter](https://twitter.com/aitbc)