copy from UI (IVS-741)

[civilx64]

Adds a button to extract tabular content of validation outcomes and format it as tab-separated, suitable for pasting into spreadsheets or text files for reporting.

[aothms]

• Only for gherkin?
• Maybe could be made generic by just getting [0]; not sure how readable that is from our reports.

[0] https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent

[civilx64]

• Only for gherkin?

I started with gherkin since that was the context of the original user request. I briefly considered extracting the copy/paste into a modular React component but stopped when it became apparent that there would be considerable effort to rework more of the UI, which we are tracking in a separate ticket and is coupled with the API design.

I opted for quick MVP focused on the software developer / product manager (validate my tool's capabilities) user persona. The requirements for an end user (validate the content of the model I am delivering) is different and I didn't want to go too far in one direction at the expense of the other.