chore: Update IWeatherService to include methods for adding weather f…

[vtjc2002]

This pull request introduces several new features and improvements to the Weather API project. The main changes include the addition of new methods for handling weather forecasts, enhancements to the IWeatherService interface, and improvements to the UnsafeService to prevent security vulnerabilities.

New Features and Methods:

• WeatherForecastsControllerTests.cs: Added three new test methods: GetWeatherForecastFound, AddWeatherForecastSuccess, and AddWeatherForecastFailure to test different scenarios for getting and adding weather forecasts.
• WeatherForecastsController.cs: Introduced the AddWeatherForecast method to handle POST requests for adding new weather forecasts. This method includes error handling and response type annotations.

Enhancements to IWeatherService Interface:

• IWeatherService.cs: Added method signatures for GetWeatherForecastsAsync, GetWeatherForecastAsync, and AddWeatherForecastAsync with detailed documentation comments.

Security Improvements:

• UnsafeService.cs: Enhanced the ReadFile method to validate user input and prevent path traversal attacks. Introduced a parameterized query in the GetProduct method to prevent SQL injection. [1] [2]

Additional Changes:

• WeatherService.cs: Added methods GetWeatherForecastAsync, GetWeatherForecastsAsync, and AddWeatherForecastAsync with documentation comments and error handling. [1] [2]