feature: Define and implement Provider interface for providers package

[raamsri]

feature: Define and implement Provider interface for providers package

Summary:

Implement Provider interface in the providers package. This interface will provide methods for interacting with various weather data providers.

Package providers must offer an interface and a factory method for weather data providers. This package is designed to facilitate the integration of various weather data providers by defining a common interface that each provider must implement. It may include a factory method to instantiate the appropriate provider based on a given name.

The main components of this package would be(Preemptively. This may change):

• Provider interface: Defines the methods that each provider must implement.
• NewProvider function: A factory method that returns the appropriate provider based on the name.

Expected usage:

	provider, err := providers.NewProvider("open-meteo")
	if err != nil {
	    log.Fatal(err)
	}
	data, err := provider.FetchData(queryParams)
	if err != nil {
	    log.Fatal(err)
	}

Details:

1. Interface Description:
   Provider interface:

   package providers
   
   type Provider interface {
        FetchData(queryParams map[string]string) (*plumber.BaseData, error)
   }

2. Package Description:

   • This package will include methods to retrieve data from different weather data providers.

3. Outcome:

   • Provide a standardized way to interact with various weather data providers.
   • Facilitate easier integration and swapping of different providers in the future.
   • Seamlessly merge API response from multiple providers to realize the required set of plumber.BaseData fields.

4. Dependencies:

   • No external dependencies apart from the obvious third party API providers
   • Ensure compatibility with existing packages that interact with weather data providers.

5. Acceptance Criteria:

   • Implement the FetchData method in the new package. More may be added as necessary.
   • Update documentation to include usage examples and integration guidelines.
   • Write unit tests to verify the functionality of the new package. [deferring this for this package til testing modules are implemented for other simpler packages]

6. Additional Information:

   • Consider future extensions to support additional weather data providers.
   • Establish the essential meteo parameters that aren't yet included in plumber.BaseData that's pulled from various providers
   • Ensure the package is designed to be easily extensible for new provider implementations.

[raamsri]

This will need many more dedicated issues to address and meet the desired outcome in smaller steps.

[yendelevium]

Cool