feat: enhance app specification structure and XML conversion

- Introduced a TypeScript interface for structured specification output to standardize project details.
- Added a JSON schema for reliable parsing of structured output.
- Implemented XML conversion for structured specifications, ensuring comprehensive project representation.
- Updated spec generation options to include output format configuration.
- Enhanced prompt instructions for generating specifications to improve clarity and completeness.

apps/server/src/lib/sdk-options.ts

@@ -174,6 +174,7 @@ export function createSpecGenerationOptions(
     allowedTools: [...TOOL_PRESETS.specGeneration],
     ...(config.systemPrompt && { systemPrompt: config.systemPrompt }),
     ...(config.abortController && { abortController: config.abortController }),
+    ...(config.outputFormat && { outputFormat: config.outputFormat }),
   };
 }