feat(stepper): Use stepper in controlled or uncontrolled mode

[Andreas-Tonnessen]

Component Development

Improves usage of 'Stepper' component and gives better control of it since it can be used in a controlled or and uncontrolled way using new optional step props.

Type

• Feature
• Fix
• Hotfix (should release ASAP)
• Maintenance (deps only)

Reference to assignment

https://statoil-proview.visualstudio.com/Fusion%20-%20Farfetchd/_workitems/edit/60228

Description of assignment

Update the 'Stepper' component so that it can be used both in an uncontrolled and controlled mode.

Description of Proposed Changes

Remove required activeStepKey prop on the 'Stepper' component and replace it with optional stepKey (for controlled use) and optional initialStepKey (for uncontrolled initial step use) props.
This is a breaking change since activeStepKey is previously required and needs to either be removed or replaced with one of the optional step props.

Update README.md and Storybook of 'Stepper' component with new examples of usage.

Checklist

Create User Story(DevOps) or Issue(Github)

• Describe functional requirements
• Design plan/suggestion (e.g. images, link to eds design or relevant figma links, mention of eds tokens to use)
• Communication with UX (evaluate if needed)

Development

• Describe the component
• Code funtional requirements
• Create stories
• Create snapshots (evaluate if needed)
• Remove unused imports and commented code
• Lint code with EsLint (and follow best practises for code quality

Create Pull Request

• Assign relevant reviewers in Github and Cromatic
• Inform colleagues of pending reviews. We use Teams for this purpose, under fusion-frontend team please tag involved reviewers in the Code review channel

Review of Pull Request

• Follow up on comments from code review and implement necessary changes (evaluate if needed)
• Review approved in github (and chromatic)

Publish Code

• Increment version number
• Merge PR
• Consider letting fusion developers know this this shiny new thing exists

[changeset-bot]

🦋 Changeset detected

Latest commit: e8fc939

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

This PR includes changesets to release 2 packages

Name	Type
@equinor/fusion-react-stepper	Major
@equinor/fusion-react-components-stories	Patch

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[Noggling]

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