Add the supporting status of subcommands in the website

[PragmaTwice]

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• [X] I had searched in the issues and found no similar issues.

Motivation

https://kvrocks.apache.org/docs/supported-commands

In this page users can check if a command is supported or not.

For CLUSTER and CLUSTERX we have a list to state the supporting status of every subcommands of these command, but for many other commands we don't, e.g. CLIENT, SCRIPT...

We need to add subcommand supporting list for every command that have subcommands.

Solution

For source code of the website, refer to https://github.com/apache/kvrocks-website.

Are you willing to submit a PR?

• [ ] I'm willing to submit a PR!