Add AgentRejectAction across multiple modules (#1615)

* Add AgentRejectAction across multiple modules

This commit introduces the AgentRejectAction class and integrates it across various modules and actions. It includes updates to READMEs, action definitions, and agent controllers to handle the new 'reject' action. This functionality will allow agents to properly signal task rejection.

* Fix unit test

* Remove wrong generates attributes from a few micro-agents

agenthub/dummy_agent/agent.py

@@ -8,6 +8,7 @@ from opendevin.events.action import (
     AddTaskAction,
     AgentFinishAction,
     AgentRecallAction,
+    AgentRejectAction,
     BrowseURLAction,
     CmdRunAction,
     FileReadAction,
@@ -123,6 +124,10 @@ class DummyAgent(Agent):
                 'action': AgentFinishAction(),
                 'observations': [],
             },
+            {
+                'action': AgentRejectAction(),
+                'observations': [],
+            },
         ]
 
     def step(self, state: State) -> Action: