Add name and expected_output to TaskOutput (#1199)

* Add name and expected_output to TaskOutput

This commit adds task information to the TaskOutput class. This is
useful to provide extra context to callbacks.

* Populate task name from function names

This commit populates task name from function names when using
annotations.

src/crewai/project/annotations.py

@@ -6,12 +6,20 @@ def task(func):
         task.registration_order = []
 
     func.is_task = True
-    wrapped_func = memoize(func)
+    memoized_func = memoize(func)
 
     # Append the function name to the registration order list
     task.registration_order.append(func.__name__)
 
-    return wrapped_func
+    def wrapper(*args, **kwargs):
+        result = memoized_func(*args, **kwargs)
+
+        if not result.name:
+            result.name = func.__name__
+
+        return result
+
+    return wrapper
 
 
 def agent(func):

src/crewai/task.py

@@ -240,7 +240,9 @@ class Task(BaseModel):
         pydantic_output, json_output = self._export_output(result)
 
         task_output = TaskOutput(
+            name=self.name,
             description=self.description,
+            expected_output=self.expected_output,
             raw=result,
             pydantic=pydantic_output,
             json_dict=json_output,

src/crewai/tasks/task_output.py

@@ -10,6 +10,10 @@ class TaskOutput(BaseModel):
     """Class that represents the result of a task."""
 
     description: str = Field(description="Description of the task")
+    name: Optional[str] = Field(description="Name of the task", default=None)
+    expected_output: Optional[str] = Field(
+        description="Expected output of the task", default=None
+    )
     summary: Optional[str] = Field(description="Summary of the task", default=None)
     raw: str = Field(description="Raw output of the task", default="")
     pydantic: Optional[BaseModel] = Field(