fix(chat): change warning category and show the currect warning message

[Randall-Jiang]

Problem

Before we are unclear about the commands' category and sometimes we show warning for some wide-used commands. Also we want to show the different warning message for destructive commands and mutable commands.

Solution

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• Treat all work as PUBLIC. Private feature/x branches will not be squash-merged at release time.
• Your code changes must meet the guidelines in CONTRIBUTING.md.
• License: I confirm that my contribution is made under the terms of the Apache 2.0 license.