Update README.md to provide a comprehensive overview of The Order monorepo, including repository structure, quickstart guide, development workflow, and contribution guidelines.

services/identity/README.md

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+# Identity Service
+
+Service for eIDAS/DID, verifiable credentials, and identity management.
+
+## Features
+
+- Wallet/IDP integration
+- Verifiable credential issuance and verification
+- Qualified signatures for eIDAS
+- DID resolution and management
+
+## Development
+
+```bash
+# Install dependencies
+pnpm install
+
+# Run development server
+pnpm dev
+
+# Build
+pnpm build
+
+# Start production server
+pnpm start
+```
+
+## API Endpoints
+
+- `GET /health` - Health check
+- `POST /vc/issue` - Issue verifiable credential
+- `POST /vc/verify` - Verify verifiable credential
+- `POST /sign` - Sign document
+
+## Environment Variables
+
+- `PORT` - Server port (default: 4002)
+- `OIDC_ISSUER` - OIDC issuer URL
+- `EIDAS_PROVIDER_URL` - eIDAS provider URL
+- `KMS_KEY_ID` - KMS key ID for signing
+