feat: move everything to single folder

cs2030s/Lab4/Improbable.java

@@ -0,0 +1,15 @@
+/**
+ * A generic Immutator that takes in an object
+ * that is T and returns an object that is probably T.
+ * CS2030S Lab 4
+ * AY22/23 Semester 1
+ *
+ * @author Yadunand Prem (10B)
+ */
+
+class Improbable<T> implements Immutator<Probably<T>, T> {
+  @Override
+  public Probably<T> invoke(T param) {
+    return Probably.just(param);
+  }
+}