[Feature] Export data to CSV

[mits87]

Hello,

my suggestion is add functionality as "export as csv" because currently we can't do this.
Second thing is allowing to put query as a text like:

    {
      TableName: 'table',
      Key: { id: 'xxx' },
      ...
      ReturnValues: 'ALL_NEW',
    }

What do you think?

[touchduck]

thanks ur teach.
it is good idea.