This PR does a first-pass of adding tsdocs to the methods of the Editor
class.
It's a minimal start — just descriptions of them, and their parameters.
It makes the Editor docs page a lot more fleshed out though, and easier
to quickly scan.
There's still a lot more to do!
### Change Type
- [x] `documentation` — Changes to the documentation only[^2]
### Release Notes
- [dev] Added initial documentation for the Editor class.
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Co-authored-by: Steve Ruiz <steveruizok@gmail.com>
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