more efforts to automate rhai bindings

rhai_autobind_macros/examples/rhai_autobind_example/calculator.rhai

@@ -0,0 +1,33 @@
+// calculator.rhai
+// This script demonstrates using the Calculator struct from Rust in Rhai
+
+// Create a new calculator
+let calc = new_calculator();
+println("Created a new calculator with value: " + calc.value);
+
+// Perform some calculations
+calc.add(5);
+println("After adding 5: " + calc.value);
+
+calc.multiply(2);
+println("After multiplying by 2: " + calc.value);
+
+calc.subtract(3);
+println("After subtracting 3: " + calc.value);
+
+calc.divide(2);
+println("After dividing by 2: " + calc.value);
+
+// Set value directly
+calc.value = 100;
+println("After setting value to 100: " + calc.value);
+
+// Clear the calculator
+calc.clear();
+println("After clearing: " + calc.value);
+
+// Chain operations
+let result = calc.add(10).multiply(2).subtract(5).divide(3);
+println("Result of chained operations: " + result);
+
+println("Final calculator value: " + calc.value);