feat: Complete API reference with Generated Code Examples page

- Added comprehensive generated-code.md showing all LUMOS outputs
- Includes examples: simple accounts, events, vectors, enums, non-Solana
- Shows both Rust and TypeScript generated code side-by-side
- Explains context-aware generation and import strategies
- Added usage examples for Anchor programs and TypeScript clients
- Updated sidebar to include Generated Code page

Closes #16 - API Reference Documentation (100% complete)

Author: rz1989s

astro.config.mjs

@@ -54,6 +54,7 @@ export default defineConfig({
 						{ label: 'CLI Commands', slug: 'api/cli-commands' },
 						{ label: 'Type System', slug: 'api/types' },
 						{ label: 'Attributes', slug: 'api/attributes' },
+						{ label: 'Generated Code', slug: 'api/generated-code' },
 					],
 				},
 				// TODO: Add these sections as we create the content