fix: copy logs text on Linux & Windows. Fixes #557

[Adrien-D]

Fixes #557

Inspired from xtermjs/xterm.js#2478 (comment) this attachCustomKeyEventHandler on the terminal catch the Ctrl+C event, and if there is a current text selection, we force the browser to copy that text.

[JPZ13]

@agilgur5 @terrytangyuan - who would be the best to ask for a review on this and other UI PRs? We have a couple UI PRs coming down the pipeline

[terrytangyuan]

I think @argoproj/argo-ui-maintainers can help review/merge this

[agilgur5]

Followed up on Slack.

As per there, prior UI maintainers unfortunately do not respond and the GH team name doesn't work anymore either 😕 See also #453 et al.

I've been reviewing various code here since I've had Approver permissions in this repo, and have asked Crenshaw, Terry, and Remington for review before. Crenshaw has responded after I've pinged him or the formerly named #argo-contributors channel several times. Remington responded a bit in the past, but not recently. In recent times, I've asked Isitha for review too since we both have Approver permissions now and Isitha works a bit on UI in Workflows.

As I'm the only active UI SME on Workflows, it would be good if I reviewed more substantial changes. If I'm not available or it's a smaller change, I think others could respond.

I was also waiting for Adrien to respond to code review I'd done last week before adding more; he did so earlier today.

[agilgur5]

LGTM