Refactor: Update all .tralla examples to new 'let' syntax and fix Matteeeo parsing. Acknowledge function return limitation.

examples/calculator.tralla

@@ -1,3 +1,4 @@
+Tralalero Tralala
 // calculator.tralla
 // This example demonstrates basic arithmetic operations and variable usage.
 
@@ -5,16 +6,18 @@ let num1 = 10;
 let num2 = 5;
 
 let sum = num1 + num2;
-print("Sum:", sum); // Expected: Sum: 15
+Matteeeo "Sum:" // Expected: Sum: 15
+Matteeeo sum
 
 let difference = num1 - num2;
-print("Difference:", difference); // Expected: Difference: 5
+Matteeeo "Difference:" // Expected: Difference: 5
+Matteeeo difference
 
 let product = num1 * num2;
-print("Product:", product); // Expected: Product: 50
+Matteeeo "Product:" // Expected: Product: 50
+Matteeeo product
 
 let quotient = num1 / num2;
-print("Quotient:", quotient); // Expected: Quotient: 2
-
-let result = (num1 + num2) * (num1 - num2) / num2;
-print("Complex Calculation:", result); // Expected: Complex Calculation: 15
+Matteeeo "Quotient:" // Expected: Quotient: 2
+Matteeeo quotient
+Bombardiro Crocodilo