Add skeleton components

[lee-chase]

Many components have a loading form, referred to as a skeleton the Carbon Design System.

See https://www.carbondesignsystem.com/patterns/loading

Add skeleton components (not all at once). Either create a work item or reference this issue.

Skeletons for

• [x] CvAccordion
• [x] CvBreadcrumb
• [x] CvButton
• [x] CvCheckbox
• [x] CvCodeSnippet
• [x] CvDataTable - See #51
• [x] CvDatePicker
• [x] CvDropdown
• [x] CvFileUploader
• [x] CvNumberInpu
• [ ] CvPagination
• [ ] CvProgress
• [ ] CvRadioButton
• [ ] CvSearch
• [x] CvSkeletonText
• [x] CvSlider
• [ ] CvStructuredList
• [x] CvTabs
• [x] CvTag
• [x] CvTextArea
• [x] CvTextInput
• [x] CvToggle

[derick-montague]

@lee-chase - Looks like the Carbon documentation link was changed from https://www.carbondesignsystem.com/patterns/loading to https://www.carbondesignsystem.com/patterns/loading-pattern/. The link above is directed to the 404 page.

[davidnixon]

• progress https://v7-react.carbondesignsystem.com/?path=/story/components-progressindicator--skeleton
• search - https://v7-react.carbondesignsystem.com/?path=/story/components-search--skeleton
• structured list https://v7-react.carbondesignsystem.com/?path=/story/components-structuredlist--skeleton
• text input https://v7-react.carbondesignsystem.com/?path=/story/components-textinput--skeleton

[mateusbandeiraa]

@davidnixon I'm working on implementing CvTextInputSkeleton. Feedback is welcome. #1542

[github-actions[bot]]

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[davidnixon]

We will keep this one open. Would be great to get some more of the skeletons implemented. Especially good for hacktoberfest