feat: Implement UserFeedback tool with corresponding test (Closes #532)

### Description This pull request introduces a new `UserFeedbackTool` that allows an agent to pause its execution and proactively ask the human user for input or guidance. This provides a more dynamic and interactive way to run agents, bridging the gap between fully autonomous operation and step-by-step approval. A user can now steer the agent if it gets stuck or needs clarification on a complex task. ### Related Issues #532 ### Solution and Design The solution involves creating a new, self-contained tool within the existing framework: - A new class `UserFeedbackTool` is created in `superagi/tools/user_feedback_tool.py`. - The tool's `_execute` method utilizes Python's built-in `input()` function to display a prompt in the console and wait for the user to respond. - The text entered by the user is captured and returned as the tool's output, which can then be used by the agent in its next step. - The tool is registered in `superagi/tools/__init__.py` to make it available for selection by the agent. ### Test Plan A unit test has been added to ensure the tool's functionality is working as expected and does not break in the future. - A new test file was created: `tests/tools/test_user_feedback_tool.py`. - The test uses `unittest.mock.patch` to simulate a user typing into the console. This allows the test to run automatically without requiring real-time human interaction. - It asserts that the tool's output string correctly contains the simulated user input. ### Type of change - [ ] Bug fix (non-breaking change which fixes an issue) - [x] New feature (non-breaking change which adds functionality) - [ ] Breaking change (fix or feature that would cause existing functionality to change) - [ ] Docs update ### Checklist - [x] My pull request is atomic and focuses on a single change. - [x] I have read the contributing guide and my code conforms to the guidelines. - [x] I have documented my changes clearly and comprehensively. - [x] I have added the required tests.