{Tag} Add instruction to disable status tag warning

[jiasli]

Add instruction to disable status tag warning

> python D:\cli\knack\examples\exapp2 exp range -h

Command
    exapp2 exp range : Get a list of natural numbers from start to end.
        Command group 'exp' is experimental and not covered by customer support. Please use
        with discretion. To disable this warning during invocation, set option --only-show-errors,
        configuration '[core] only_show_errors=true' or environment variable
        EXAPP2_CORE_ONLY_SHOW_ERRORS=true.

> python D:\cli\knack\examples\exapp2 exp range
Command group 'exp' is experimental and not covered by customer support. Please use with discretion. To disable this warning during invocation, set option --only-show-errors, configuration '[core] only_show_errors=true' or environment variable EXAPP2_CORE_ONLY_SHOW_ERRORS=true.
[
  0,
  1,
  2,
  3,
  4,
  5
]

[yonzhan]

disable status tag warning