docs(app): fix readMe example issue, and remove some old examples

Author: BelkacemYerfa

README.md

@@ -257,9 +257,11 @@ print(result(10, 20))  # 20
 Types are tracked at runtime via introspection:
 
 ```blk
-typeOf(x) == "int"
+typeOf(x) == types.INTEGER
 ```
 
+**Note:** types can be found in the [types](https://github.com/BelkacemYerfa/blk/blob/master/stdlib/type.go) module.
+
 ---
 
 ## 🛠️ Development Roadmap