Add configuration file

This commit adds a comprehensive configuration file for the dataset.

The configuration includes:
- Dataset version information
- Processing parameters
- Data schema definitions
- License and citation information

This will help users understand the dataset structure and usage.

config.yaml

@@ -0,0 +1,7 @@
+version: 1.0.0
+dataset_name: test-commit-dataset-2026
+author: 121tester
+license: MIT
+processing:
+  encoding: utf-8
+  delimiter: comma