Add opmode commands for firewall zones, and add global state-policies… (backport #1238)

[mergify]

This is an automatic backport of pull request #1238 done by Mergify.
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	modified:   docs/configuration/firewall/zone.rst

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[rebortg]

@nicolas-fort would you please look on the conflicts, there was a other PR i merged first. Or do we need this not anymore?

[github-actions]

This pull request has conflicts, please resolve those before we can evaluate the pull request.