Docs about OpenZiti settings when working with EdgeX foundry

[ngjaying]

Add documentation about how to enable OpenZiti in eKuiper and how to work with EdgeX Foundry in secure mode.

What would you like to be added/modified: EdgeX rule engine tutorial: https://github.com/lf-edge/ekuiper/blob/master/docs/en_US/edgex/edgex_rule_engine_tutorial.md EdgeX command tutorial, this will call EdgeX REST API: https://github.com/lf-edge/ekuiper/blob/master/docs/en_US/edgex/edgex_rule_engine_tutorial.md

Why is this needed:

[ngjaying]

@dovholuknf The docs proposal, FYI