Add helper text to Classification, Moderation & term cleanup screen

[hugosolar]

Description of the Change

Adds helper texts to Watson settings as described in #919
Adds helper texts to Threshold % and change label.
Adds a new file to store helper texts

Closes #919 #918 #793

How to test the Change

• Switch to the feature branch
• run npm run build
• Test admin settings screen
• Language Processing > Classification
  Tooltip
  

Threshold

• Language Processing > Term cleanup
  Threshold
  

• Language Processing > Moderation

Changelog Entry

Added - New feature

• Helper texts for Watson settings
• Helper text for Threshold confidence
• Helper text for Moderation

Credits

Props @hugosolar

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added Critical Flows, Test Cases, and/or End-to-End Tests to cover my change.
• All new and existing tests pass.

[dkotter]

Overall this looks good to me, nice work here. There are a bunch of eslint errors though that we'll want to get cleaned up before merging this in

[dkotter]

Also, worth looking at #953 as it introduces some helper text as well and takes a slightly different approach (modal). We should standardize here so we don't have different approaches for the same thing. I'm okay with either, seems like maybe the modal approach gives us more flexibility though?

[hugosolar]

@dkotter you're right! I think it gave us more flexibility so I think we should go with that solution instead.
I guess I need to wait until those changes get merged and adding the documentation using that method. does that make sense to you?

[dkotter]

@dkotter you're right! I think it gave us more flexibility so I think we should go with that solution instead. I guess I need to wait until those changes get merged and adding the documentation using that method. does that make sense to you?

Yep, makes sense. I think the plan is to create a reusable component in that other PR so hopefully once that's done, it's a fairly easy implementation here

[jeffpaul]

@hugosolar if you've got continued time, perhaps helping get #953 to done would be great and then we can double back here to update accordingly?

[dkotter]

Note I've made a handful of changes here, mostly around utilizing core WP components where possible instead of our own tooltip components. This looks good to get merged in now.

[github-actions]

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