[Proposal] Add the feature of importing and exporting metadata by CSV file

[李蓉]

Hello Everyone,
 
I am Rong Li. I am excited to share with you a feature that I have been working 
on for the past few months.

As we all know, IoTDB supports various forms of importing and exporting data, 
but does not support importing and exporting metadata. In practical use, there 
are also many scenarios that require importing and exporting metadata, so I 
added a metadata import and export script to achieve this function.
 
I hope you are interested in this feature and would like to participate in the 
development and testing. You can also leave your comments and suggestions in 
this thread. Appreciate any suggestion/feedback & contribution.
 
Thank you for your attention and support.

Best regards,

Rong Li

Reference:
https://github.com/apache/iotdb/pull/12623

Permission request

[李蓉]

Hi,I'm rongli,from Shaanxi Province.I have a wide range of interests and 
hope to get along with everyone in harmony.It's a pleasure to meet you all，and 
I hope to learn from each other in the future.
my jira id is rongli and my Confluence id : RongLi .