Fix/yaml formatting (#590)

* Bug/curly_braces_yaml

Added parser to help users on yaml syntax

* context error

Patch and later will prioritize this again to have context work with the yaml

src/crewai/utilities/__init__.py

@@ -6,3 +6,4 @@ from .printer import Printer
 from .prompts import Prompts
 from .rpm_controller import RPMController
 from .fileHandler import FileHandler
+from .parser import YamlParser