feat: move everything to single folder

cs2030s/Lab6/Cond.java

@@ -0,0 +1,21 @@
+/**
+ * Represents a conditional type.
+ * CS2030S Lab 5
+ * AY20/21 Semester 2
+ *
+ */
+interface Cond {
+  /**
+   * Evaluates the given conditional.
+   * 
+   * @return the boolean result of the evaluation
+   */
+  boolean eval();
+
+  /**
+   * negates the value of the conditional, without evaluating it.
+   * 
+   * @return a new conditional, with the negated value
+   */
+  Cond neg();
+}