Add fresher-qa module: 50 Java interview questions for freshers, one runnable demo each, asserted transcripts, javac error captures

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b5DfjBGLBr7F5km2AN

fresher-qa/src/broken/PreSuper.java

@@ -0,0 +1,10 @@
+class Animal {
+    Animal() { }
+}
+
+class Puppy extends Animal {
+    Puppy(String name) {
+        if (name.isBlank()) throw new IllegalArgumentException("name required");
+        super();
+    }
+}