chore: enhance typing and documentation in tasks module (#3467)

- Disable E501 line length linting rule
- Add Google-style docstrings to tasks leaf file
- Modernize typing and docs in task_output.py
- Improve typing and documentation in conditional_task.py

src/crewai/tasks/output_format.py

@@ -1,8 +1,16 @@
+"""Task output format definitions for CrewAI."""
+
 from enum import Enum
 
 
 class OutputFormat(str, Enum):
-    """Enum that represents the output format of a task."""
+    """Enum that represents the output format of a task.
+
+    Attributes:
+        JSON: Output as JSON dictionary format
+        PYDANTIC: Output as Pydantic model instance
+        RAW: Output as raw unprocessed string
+    """
 
     JSON = "json"
     PYDANTIC = "pydantic"