fix: update regex validation handling and make properties optional in ValidationObject

- Refactored the applyRegexValidation function to improve readability by storing the regExp in a variable before usage.
- Made the regExp and message properties optional in the ValidationObject type to allow for more flexible validation scenarios.
- Cleaned up imports in CreateView.vue by removing unused imports to enhance code clarity and maintainability.

https://web.tracklify.com/project/2b7ZVgE5/AdminForth/1155/9bItdaNO/backend-validation-function-le

Author: yaroslav8765