test raft cluster by python

### Which kiwi functionalities are relevant/related to the feature request?

_No response_

### Description

### Which PikiwiDB functionalities are relevant/related to the feature request?

raft

### Description

基于规则的方式，编写raft cluster测试case。比如
- set 一些 key，然后做了raft log compact、add node、kill leader，最后 get key验证数据是否正确
- 多节点运行，将其中一个节点ctrl + z，然后写大量数据，然后取消ctrl + z，验证数据是否正确
- 批量 add 很多 node，然后 set/get key 看看结果是否符合预期
等

### Proposed solution

详细可见：https://github.com/OpenAtomFoundation/pikiwidb/discussions/273#discussioncomment-9142169

### Alternatives considered

使用go、shell也都可以。主要是实现类似的测试case

### Proposed solution

_No response_

### Alternatives considered

_No response_