feat(resource): 支持从其他实例导入资源包与光影包 [GPT-5.6] - #3536

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Nullability of type of parameter 'message' doesn't match overridden member (possibly because of nullability attributes).

Nullability of type of parameter 'message' doesn't match overridden member (possibly because of nullability attributes).

Calling 'ArgumentNullException.ThrowIfNull' and passing a non-nullable value is a no-op (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2264)

Calling 'ArgumentNullException.ThrowIfNull' and passing a non-nullable value is a no-op (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2264)