I need command line interface, which fully support everything
Command line interface already exists in some form on all installs.
You can login to the console. You can SSH in using an addin (you can configure that for protected login to the OS in some cases) or if you’re using core, container or some other install mechanism it’s there.
I sense frustration with not having direct access to a ROOT command shell in HAOS - and if that’s what you’re asking for that’s not the experience HAOS is designed for. (you might as well be screaming onto the void on that ask - doubt you’ll ever see it.) instead you may need one of the other install mechanisms or to reconsider what you need root SSH for.
If you need to do things on the OS that can not be done through the normal HA interface, then you should run a HA Core installation instead.
No, I want high level command line interface with help, for example create new automation in command line. Without edition of config file, but dialog in command line. Such interface also good for HA core. To do everything except Lovelace in command line. It will be very useful for debug, reload some part of ha, filter entities.
There are literally thousands of possible commands you can run. It would be impossible to make that in GUI.
Only guessing.
I think he wants something like the template helper, where you can add the command line to execute.
Very simple, imagine HA like Linux command line program. For such commands: ha core reload automations; ha automation add; ha devices print online; ha location change
And the HA-CLI already exists
They document common system tasks using CLI in the documents
Common tasks - Operating System - Home Assistant (pick ‘Using the CLI’ instead of ‘Using the UI’ in the relevant boxes)