[FEAT] - Add a prompt box for secondary confirmation for sensitive operations

[XiangtingLee]

Some sensitive operations for Index are easy to misuse. It is hoped that a secondary confirmation prompt box similar to Cerebro can be added for Index operations.

In Cerebro:

[cars10]

Hey @XiangtingLee , thanks for using elasticvue :) Deleting an index already requires a confirmation. I do not consider forcemerge, refresh, flush or index clear to be a sensitive operation because all of these happen automatically anyway.
Opening and closing is debateable i guess - i will think about that :)

[cars10]

Added a confirm message for closing indices, will be released with the upcoming beta 6.