Auto inject crewai_trigger_payload (#3351)

* feat: add props to inject trigger payload

* feat: auto-inject trigger_input in the first crew task

src/crewai/crew.py

@@ -503,6 +503,7 @@ class Crew(FlowTrackable, BaseModel):
                         )
         return self
 
+
     @property
     def key(self) -> str:
         source: List[str] = [agent.key for agent in self.agents] + [
@@ -639,6 +640,7 @@ class Crew(FlowTrackable, BaseModel):
                 self._inputs = inputs
                 self._interpolate_inputs(inputs)
             self._set_tasks_callbacks()
+            self._set_inject_trigger_input_for_first_task()
 
             i18n = I18N(prompt_file=self.prompt_file)
 
@@ -1508,3 +1510,10 @@ class Crew(FlowTrackable, BaseModel):
         """Reset crew and agent knowledge storage."""
         for ks in knowledges:
             ks.reset()
+
+    def _set_inject_trigger_input_for_first_task(self):
+        crewai_trigger_payload = self._inputs and self._inputs.get("crewai_trigger_payload")
+        able_to_inject = self.tasks and self.tasks[0].inject_trigger_input is None
+
+        if self.process == Process.sequential and crewai_trigger_payload and able_to_inject:
+            self.tasks[0].inject_trigger_input = True