[FEATURE] Add configuration option for default data format

[synackd]

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
On top of the -F and -f options, it would be convenient to have a config file option to specify the default format instead of having to specify the relevant flag(s) each time.

For instance, if yaml is used as input/output format a lot, instead of having -F yaml and -f yaml for every command, specifying something like:

default-input-format: yaml
default-output-format: yaml

Would eliminate the need to specify those flags each time. Of course, the format could still be overridden by the CLI flags.

Describe alternatives you've considered
Not having config options, but there is sufficient demand to have it.

Additional context
N/A