Add a copy text button to each transcript segment

### Feature Description

_A clear and concise description of the feature you're requesting._

Add a copy text button to each transcript segment.

### Use Case

_Please provide a use case to help us understand your request in context._

Directly asked from a user in Asheville! Just make it easier to copy text.

### Solution

_Please describe your ideal solution._

Add a button that will place the text of the current segment into the users copy. The button should go next to the existing "Jump to point in..." buttons and be placed along with them.

### Alternatives

_Please describe any alternatives you've considered, even if you've dismissed them._

### Screenshots/References

_In the case of a visually oriented feature or component request, providing drawings, screenshots, and/or links to examples of what you're seeking will be very helpful._

We use icons from heroicons: https://heroicons.com/

I think the normal "clipboard" icon which you can get from searching "copy" is perfect.