🧠 added examples

examples/classes.arc

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+class Breakfast {
+  cook() {
+    print "Eggs a-fryin'!";
+  }
+
+  serve(who) {
+    print "Enjoy your breakfast, " + who + ".";
+  }
+}
+
+var someVariable = Breakfast();
+someVariable.serve("arc");

examples/doughnut.arc

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+class Doughnut {
+  cook() {
+    print "Fry until golden brown.";
+  }
+}
+
+class BostonCream < Doughnut {} 
+
+~ cook() method is inherited from `Doughnut` to  'BostonCream'
+
+BostonCream().cook(); 

examples/hello-world.arc

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+~ First arc program 
+print "Hello, world!";

examples/local-functions.arc

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+fn returnFunction() {
+  var outside = "outside";
+
+  fn inner() {
+    print outside;
+  }
+
+  return inner;
+}
+
+var fun = returnFunction();
+fun();

examples/super-doughnut.arc

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+class Doughnut {
+  cook() {
+    print "Fry until golden brown.";
+  }
+}
+
+class BostonCream < Doughnut {
+  cook() {
+    super.cook();
+    print "Pipe full of custard and coat with chocolate.";
+  }
+}
+
+~ super.cook() calls cook() method in superclass 'Doughnut'
+
+BostonCream().cook();