When using `-d` to pass in the config

[SteveL-MSFT]

Summary of the new feature / enhancement

-i is intended for JSON content while -p is the path to a JSON file. Users may mix this up, so when using -i, if it's not valid JSON, we should check if it's a valid filepath and if so, inform in the error message it looks like a filepath and they should use -p instead. Similarly, if -p doesn't find the file, see if the input is JSON and give better error message.

Proposed technical implementation details (optional)

No response

[SteveL-MSFT]

Parameter was changed to -d but the scenario still exists