Storybook: Add stories for Checkbox control component (#17891)

* Add checkbox control stories for Storybook

* Update README example to match story, useState

* Apply suggestions from code review

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Co-Authored-By: Enrique Piqueras <epiqueras@users.noreply.github.com>

* Update story to match README

* Add variants for heading, label, help

* Update packages/components/src/checkbox-control/README.md

Co-Authored-By: Grzegorz (Greg) Ziółkowski <grzegorz@gziolo.pl>

* Add Knobs addon to Storybook

* Move storybook addon to dev-dependencies

* Solve lint dependency by excluding stories, dont need in package.json

* Apply suggestions from code review

Co-Authored-By: Enrique Piqueras <epiqueras@users.noreply.github.com>

* Update with story level decorators

* Switch back to global withKnobs, per story not working

* Change the name of the example in ChecboxControl story

* Try with the uppercase name of the component exported from stories

.eslintrc.js

@@ -123,7 +123,7 @@ module.exports = {
 				'**/*.@(android|ios|native).js',
 				'**/benchmark/**/*.js',
 				'**/@(__mocks__|__tests__|test)/**/*.js',
-				'**/storybook/**/*.js',
+				'**/@(storybook|stories)/**/*.js',
 			],
 		},
 		{