feat: add JSON Schema validation for VS Code settings

Add JSON Schema generation for settings.json files to provide IntelliSense
and validation support in VS Code. The schema is automatically generated
from the internal SETTINGS_SCHEMA definition during the build process.

- Add generate-settings-schema.ts script to convert TypeScript schema to JSON Schema
- Add jsonValidation contribution to vscode-ide-companion package.json
- Include schemas directory in .vscodeignore for packaging
- Integrate schema generation into build process

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

scripts/build.js

@@ -54,6 +54,15 @@ for (const workspace of buildOrder) {
     stdio: 'inherit',
     cwd: root,
   });
+
+  // After cli is built, generate the JSON Schema for settings
+  // so the vscode-ide-companion extension can provide IntelliSense
+  if (workspace === 'packages/cli') {
+    execSync('npx tsx scripts/generate-settings-schema.ts', {
+      stdio: 'inherit',
+      cwd: root,
+    });
+  }
 }
 
 // also build container image if sandboxing is enabled