feat: Add inject_date flag to Agent for automatic date injection

Co-Authored-By: Joe Moura <joao@crewai.com>

docs/usage_examples/inject_date_example.py

@@ -0,0 +1,22 @@
+from crewai import Agent, Task, Crew
+
+agent = Agent(
+    role="research_analyst",
+    goal="Provide timely and accurate research",
+    backstory="You are a research analyst who always provides up-to-date information.",
+    inject_date=True,  # Enable automatic date injection
+)
+
+task = Task(
+    description="Research market trends and provide analysis",
+    expected_output="A comprehensive report on current market trends",
+    agent=agent,
+)
+
+crew = Crew(
+    agents=[agent],
+    tasks=[task],
+)
+
+result = crew.kickoff()
+print(result)