[REQUEST] 添加clean功能，用于清理本地中断的实验记录文件夹。或者在SwanKitCallback中，实现before_init_experiment函数能够获取run_dir目录，这样用户可以自己实现插件往run-*目录中读写内容。 #1106
Description
🤩 Features description [Please make everyone to understand it]
Briefly describe this feature
👍 What problem does this feature solve
清理swanlog目录
👾 What does the proposed API look like
swanlab clean --logdir
或者实现
class StatusPoint(SwanKitCallback):
def before_init_experiment(
self,
run_dir: str, # 实现可以通过插件在初始化的时候，获取实验本地记录的目录文件夹，这样用户就能自己实现往实验目录中添加记录信息。
run_id: str,
exp_name: str,
description: str,
colors: Tuple[str, str],
*args,
**kwargs,
):