feat: Add OasInputService for handling OpenAPI specifications from body or URL

refactor: Update OasValidatorService for improved error handling and code consistency

refactor: Clean up Service.js for better readability and consistency in string usage

feat: Enhance ToolsService with new methods for OAS conversion and dereferencing

style: Standardize import statements and formatting across services

fix: Improve error handling in openapiRouter for better logging and response management

Author: pasibun