fix: compatibilité Windows pour la génération de docs

- execFileAsync avec shell:true pour trouver asyncapi.cmd/redocly.cmd sur Windows
- DOCS_OUTPUT_DIR par défaut ./docs-output (cross-platform) au lieu de /app/docs-output

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

back/src/modules/docs-generation/docs-generation.service.ts

@@ -9,7 +9,7 @@ const execFileAsync = promisify(execFile);
 
 @Injectable()
 export class DocsGenerationService {
-  private readonly outputDir = process.env.DOCS_OUTPUT_DIR ?? '/app/docs-output';
+  private readonly outputDir = process.env.DOCS_OUTPUT_DIR ?? './docs-output';
 
   constructor(
     @Inject(forwardRef(() => ApisService))
@@ -51,7 +51,7 @@ export class DocsGenerationService {
       '--no-interactive',
       '--install',
       '--force-write',
-    ]);
+    ], { shell: true });
   }
 
   private async generateOpenApi(yamlPath: string, outputDir: string): Promise<void> {
@@ -59,6 +59,6 @@ export class DocsGenerationService {
       'build-docs',
       yamlPath,
       '--output', path.join(outputDir, 'index.html'),
-    ]);
+    ], { shell: true });
   }
 }