An argument to fallback to plain text if invalid input

[andreif]

Please describe your feature request.

Sometimes commands that output YAML can produce extra warnings that stop yq from showing what was the original output. It would be great to optionally dump the raw output in such cases so we don't have to use workarounds for that.

Describe alternatives you've considered

Temp files and variables could work but having a simple arg (like debug etc.) to achieve this would be so much easier and concise.

Additional context

Example: AWS CDK CLI run can result in an error and piping to yq directly makes it impossible to see what went wrong.

[andreif]

Highlighting the valid part of the output would be a dream.

[andreif]

I.e. replacing

cdk synth | tee _ | yq -P || cat _; rm _

with

cdk synth | yq -P --debug
cdk synth | yq -P -d
cdk synth | yq -Pd