Add supportsDifficulty function for GameType compatibility

[teogor]

Summary:

This pull request introduces a new function named supportsDifficulty to the GameType enum. This function allows determining whether a specific GameType supports a given Difficulty level.

Details:

• The supportsDifficulty function takes a Difficulty as input and returns true if the current GameType supports it, and false otherwise.
• This functionality utilizes the SEEDS data source to determine compatible combinations.
• The implementation is efficient and leverages existing data structures.

Benefits:

• Improved Developer Experience: Enables clear checking of supported difficulties for each GameType.
• Enhanced Code Readability: Provides a dedicated function for this common task.
• Reduced Errors: Helps prevent invalid Difficulty assignments for unsupported GameTypes.
• Potential for Future Features: Opens doors for Difficulty-based gameplay mechanics.