feat: support named members in tuples

- Add NamedSchema interface with optional name property
- Update TupleSchema.elements to use NamedSchema[]
- Add parseNamedSchema() to support [x: number; y: number] syntax
- Update validator to parse named members in tuple values
- Fix schemaToTypeString in csv-loader for NamedSchema
- Fix createValidator to handle NamedSchema.schema
- Ensure single named element stays as tuple (not array)

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

src/csv-loader/loader.ts

@@ -40,12 +40,12 @@ function schemaToTypeString(schema: Schema): string {
       return 'boolean';
     case 'array':
       if (schema.element.type === 'tuple') {
-        const tupleElements = schema.element.elements.map(schemaToTypeString);
+        const tupleElements = schema.element.elements.map((el) => schemaToTypeString(el.schema));
         return `[${tupleElements.join(', ')}]`;
       }
       return `${schemaToTypeString(schema.element)}[]`;
     case 'tuple':
-      const tupleElements = schema.elements.map(schemaToTypeString);
+      const tupleElements = schema.elements.map((el) => schemaToTypeString(el.schema));
       return `[${tupleElements.join(', ')}]`;
     default:
       return 'unknown';