feat(tools): knobs

[bennypowers]

What I did

1. add elements to tools
2. add pft-element-knobs
3. add knobs demos to dev server

Testing Instructions

1. run the dev server
2. http://localhost:8000/
3. click on knobs

Notes to Reviewers

1.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: dc7175ef5f538ac0fb4918d9caf08e62c6a57ccd

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

| Name | Type | | --------------------- | ----- | | @patternfly/elements | Major | | @patternfly/pfe-core | Major | | @patternfly/pfe-tools | Minor |

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[netlify[bot]]

✅ Deploy Preview for patternfly-elements ready!

Name	Link
🔨 Latest commit	f6d3db3716a0360f3dd0f2f632b090ce580522b4
😎 Deploy Preview	https://deploy-preview-2781--patternfly-elements.netlify.app/

---

To edit notification comments on pull requests, go to your Netlify site settings.

[github-actions[bot]]

SSR Test Run for ad7b36d4ff06149aa4045604317b4bbd079b908a: Report

[github-actions[bot]]

SSR Test Run for 80c0e664004c475bc2b3b4e493e23e9becc3e9f4: Report

[github-actions[bot]]

SSR Test Run for f6d3db3716a0360f3dd0f2f632b090ce580522b4: Report

[zeroedin]

@bennypowers this is great! Thinking about picking up pf-drawer to support this. My thinking is maybe the knobs could be out of the way on initial load then toggleable via a drawer. Thoughts?

[bennypowers]

There can be quite a lot of content, more than a side drawer

See text-input for example

Maybe a bottom panel

[zeroedin]

Maybe a bottom panel

Yeah I also noted the resizable drawer too which might be nice on certain viewport sizes.