output enums as x-enumNames

[chiptus]

Is your feature request related to a problem? Please describe.
I'm trying to generate client side type from my swagger doc, and the generators I find don't support x-enum-varnames, instead they support x-enumNames. Would be nice to choose the output.

Describe the solution you'd like
add a flag --enum-type="x-enumNames"|"x-enum-varnames"

Describe alternatives you've considered
running another tool that will transform the swagger doc

Additional context
see sandbox for more context https://codesandbox.io/p/devbox/naughty-noyce-5g2n53