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/installation.md

@@ -0,0 +1,53 @@
+---
+title: Installation
+description: Install and set up AITBC on your system
+---
+
+# Installation
+
+This guide will help you install AITBC on your system.
+
+## System Requirements
+
+- Python 3.8 or higher
+- Docker and Docker Compose (optional)
+- 4GB RAM minimum
+- 10GB disk space
+
+## Installation Methods
+
+### Method 1: Docker (Recommended)
+
+```bash
+# Clone the repository
+git clone https://github.com/aitbc/aitbc.git
+cd aitbc
+
+# Start with Docker Compose
+docker-compose up -d
+```
+
+### Method 2: pip Install
+
+```bash
+# Install the CLI
+pip install aitbc-cli
+
+# Verify installation
+aitbc --version
+```
+
+### Method 3: From Source
+
+```bash
+# Clone repository
+git clone https://github.com/aitbc/aitbc.git
+cd aitbc
+
+# Install in development mode
+pip install -e .
+```
+
+## Next Steps
+
+After installation, proceed to the [Quickstart Guide](quickstart.md).