Add tools ReplayBuffer for TorchRL via patch_object

[k82cn]

Motivation

Currently, we only provide raw operation about object in Flame. But there're still several common tools for 3rd part libarary, e.g. ReplayBuffer in TorchRL. This feature will add a modle, named flamepy.tools, to support those libraries; the first tool is ReplayBuffer for TorchRL.

Function Specification

1. Add flamepy.tools model in py sdk
2. Add ReplayBuffer for TorchRL
3. Add example of ReplayBuffer to show the differentiation

Solutions

1. Based on patch_object to support multi client updated
2. Support different py type of object via generic in Py
3. Update the example of replay buffer accordingly

Additional context

The flamepy.tools should be well organized, as it'll include more tools for 3rd part lib. For example, we should have a torchrl sub model for ReplayBuffer of TorchRL.