cli: default to ensure_ascii=False

[mustafa0x]

Is your feature request related to a problem? Please describe.
ascii escaping makes non-latin chars much harder to understand

Describe the solution you'd like
default to ensure_ascii=False. many tools do this. eg orjson

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.