Skip static requirements in protocols

[sidepelican]

Currently, when generating Java code from a Swift protocol (JNI only), static requirements are mapped directly to static methods in a Java interface.
However, unlike Swift protocols, Java interfaces do not support 'static requirements'. This leads to the following compilation errors:

/Users/iceman/github/swift-java/Samples/SwiftJavaExtractJNISampleApp/.build/plugins/outputs/swiftjavaextractjnisampleapp/MySwiftLibrary/destination/JExtractSwiftPlugin/src/generated/java/com/example/swift/ProtocolWithStatic.java:23: error: missing method body, or declare abstract
  public static long myFunc();
                     ^
/Users/iceman/github/swift-java/Samples/SwiftJavaExtractJNISampleApp/.build/plugins/outputs/swiftjavaextractjnisampleapp/MySwiftLibrary/destination/JExtractSwiftPlugin/src/generated/java/com/example/swift/ProtocolWithStatic.java:35: error: missing method body, or declare abstract
  public static long getValue();
                     ^

While there might be a design pattern to introduce 'static requirements' in Java, this feels like a complex change with many points of contention that would require significant time.

To ensure the generated code is compilable, this PR updates the generator to ignore them.

[ktoso]

Lgtm but please add a note to the features list that this isn't supported

[sidepelican]

Actually, I realized there is a slight gap in this implementation.
I missed the case where JavaInterfaceProtocolWrapper is generated.

JavaInterfaceProtocolWrapper cannot be generated when there are static requirements, we will need to skip it in those cases as well.

swift-java/Sources/JExtractSwiftLib/JNI/JNISwift2JavaGenerator+InterfaceWrapperGeneration.swift

Line 80 in 1fbab46

func generate(for type: ImportedNominalType) throws -> JavaInterfaceSwiftWrapper {

That said, this PR still provides an improvement as-is.
We could merge this first, and I can address the remaining JavaInterfaceProtocolWrapper issue in a separate PR.

[ktoso]

That's fine, let's merge this and follow up then