[REQ] Add Method to Retrieve Enum Field Description

[koddek]

Description:

Please consider implementing a new method that allows retrieving the description of an enum field when using the [Description] attribute. This feature is particularly useful when you do not have control over the API, and thus cannot switch from using [Description] to [Label] attributes for enum descriptions.

Example Use Case:

enum Company
{
    [Description("Apple, Inc.")]
    Apple = 0,
}

// Proposed new method usage
var description = Company.Apple.GetEnumDescription();  // Should return "Apple, Inc."

Request Details:

• Functionality: Add a method named GetEnumDescription or similar to FastEnum which returns the string value of the [Description] attribute associated with an enum value.

• Purpose: To enable developers to easily access enum descriptions even when they cannot modify the enum definition to use alternative attributes like [Label].

Implementation Considerations:

• The method should handle cases where no [Description] attribute is present, perhaps by returning the enum name or null.

• Ensure the method works across different .NET versions if applicable.

Thank you.