* added PageBinaryUpdateSerializer for binary data validation and update
* chore: added validation for description
* chore: removed the duplicated file
* Fixed coderabbit comments
- Improve content validation by consolidating patterns and enhancing recursion checks
- Updated `PageBinaryUpdateSerializer` to simplify assignment of validated data.
- Enhanced `content_validator.py` with consolidated dangerous patterns and added recursion depth checks to prevent stack overflow during validation.
- Improved readability and maintainability of validation functions by using constants for patterns.
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Co-authored-by: Dheeraj Kumar Ketireddy <dheeru0198@gmail.com>
