[tools-v2]:add bs query volume snapshot

[Cyber-SiKu]

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Is your feature request related to a problem? (你需要的功能是否与某个问题有关?)

Describe the solution you'd like (描述你期望的解决方法)

curve/tools/snaptool/snaptool.py

Lines 28 to 29 in 44949da

	elif args.optype == "query-snapshot":
	querysnap.query_snapshot(args)

Describe alternatives you've considered (描述你想到的折衷方案)

Additional context/screenshots (更多上下文/截图)

[Xinlong-Chen]

i will do this task~

[ZackSoul]

I want to assign this issue

[ZackSoul]

I'm from Beihang university, majoring in software engineering, commonly used languages are go and java, interested in the distributed field, I've been working on issues related to this before, so I'd like to apply this