move java bean conventions out of SwiftExtract

Author: ktoso

Sources/JExtractSwiftLib/Convenience/String+JavaNaming.swift

@@ -0,0 +1,26 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2024-2026 Apple Inc. and the Swift.org project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of Swift.org project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+extension String {
+  /// Returns whether the string is of the format `isX` (Java Beans boolean
+  /// property naming convention)
+  package var hasJavaBooleanNamingConvention: Bool {
+    guard self.hasPrefix("is"), self.count > 2 else {
+      return false
+    }
+
+    let thirdCharacterIndex = self.index(self.startIndex, offsetBy: 2)
+    return self[thirdCharacterIndex].isUppercase
+  }
+}

Sources/SwiftExtract/Convenience/String+Extensions.swift

@@ -30,16 +30,6 @@ extension String {
     return "\(f.lowercased())\(String(dropFirst()))"
   }
 
-  /// Returns whether the string is of the format `isX`
-  package var hasJavaBooleanNamingConvention: Bool {
-    guard self.hasPrefix("is"), self.count > 2 else {
-      return false
-    }
-
-    let thirdCharacterIndex = self.index(self.startIndex, offsetBy: 2)
-    return self[thirdCharacterIndex].isUppercase
-  }
-
   /// If the string ends with `.swift`, return it without that suffix;
   /// otherwise return self unchanged
   package func dropSwiftFileSuffix() -> String {