Initial commit: skills library

- 70 skills with code and documentation
- Add .gitignore (ignore __pycache__, output/, temp/, venv/)
- Clean up test intermediates and caches

pptx/ooxml/scripts/validation/__init__.py

@@ -0,0 +1,15 @@
+"""
+Validation modules for Word document processing.
+"""
+
+from .base import BaseSchemaValidator
+from .docx import DOCXSchemaValidator
+from .pptx import PPTXSchemaValidator
+from .redlining import RedliningValidator
+
+__all__ = [
+    "BaseSchemaValidator",
+    "DOCXSchemaValidator",
+    "PPTXSchemaValidator",
+    "RedliningValidator",
+]