Enhance ZON parser to support tuples and update documentation

- Modify parser to handle ZON tuples (`.{ 1, 2, 3 }`) as arrays
- Update README with more detailed explanation of ZON tuple syntax
- Add multiple example ZON files demonstrating tuple usage
- Implement tuple parsing in `parser.py`
- Add test case for tuple parsing

examples/simple.zon

@@ -0,0 +1,6 @@
+.{
+    .name = "example",
+    .version = "1.0.0",
+    .numbers = .{ 1, 2, 3 },
+    .strings = .{ "one", "two", "three" },
+}