Java 27 and 26: runnable demos and captured output for every JEP, plus version lanes

recap26/src/broken/ThreadStopGone.java

@@ -0,0 +1,7 @@
+// Thread.stop() has thrown UnsupportedOperationException since 20. In 26 the method itself is gone.
+public class ThreadStopGone {
+    public static void main(String[] args) {
+        Thread t = new Thread(() -> {});
+        t.stop();
+    }
+}