Add option to copy query results directly to clipboard

[SamWheating]

Description

This adds the option to copy query results directly to the clipboard.

Other database UIs (such as BigQuery) provide a similar option and I use it all the time to copy results into github comments, slack threads etc.

Demo:

(sorry for weird compression, I don't know how to make good screen-recording gifs)

Open Questions:

• Is it Ok to have copyJSONResultsToClipboard in download.ts, or should it live in its own file under src/utils/
• Is the phrasing on the dropdown menu clear enough?
• Should we impose a hidden limitation to prevent crashing the browser with a large output (max 1000 lines, etc)?

Release note

Added option to copy query results in the UI directly to the clipboard

This PR has:

• been self-reviewed.
• a release note entry in the PR description.
• added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader.
• added unit tests or modified existing tests to cover new code paths, ensuring the threshold for code coverage is met.
• added integration tests.
• been tested in a test Druid cluster.

[adarshsanjeev]

Hi @SamWheating!

Thanks for the PR! The changes look good and this is a welcome feature. There are a few checkstyle failures in the build due to the imports. Could you please resolve them?

[abhishekagarwal87]

@SamWheating - let us know once you fix the build so we can merge this PR.

[SamWheating]

@abhishekagarwal87 thanks for the nudge, I thought I fixed it but it looks like I missed one other check. Should be fixed now but I'll keep an eye on the current CI run.

[vogievetsky]

Thank you for the contribution. This is a really cool chance. Made some suggestions. LMK what you think.

[vogievetsky]

Thank you for addressing the feedback!