[Extensibility] Feature branch for Extensibility V2

[bendvc]

Description

This PR contains all the changes to support Extensibility V2. Below is a list of PRs that has been merged into this branch. To find more details, please look at the change log files.

Types of Changes

• [ ] Bug fix (non-breaking change that fixes an issue)
• [x] New feature (non-breaking change that adds functionality)
• [ ] Documentation update
• [x] Breaking change (could cause existing functionality to not work as expected)
• [ ] Other changes (non-breaking changes that does not fit any of the above)

Changes

• (change1)

How to Test-Drive This PR

• (step1)

Checklists

• [ ] Update base branch once "next" is available.

General

• [ ] Changes are covered by test cases
• [ ] CHANGELOG.md updated with a short description of changes (not required for documentation updates)

Accessibility Compliance

You must check off all items in one of the follow two lists:

• [ ] There are no changes to UI

or...

• [ ] Changes were tested with a Screen Reader (iOS VoiceOver or Android Talkback) and had no issues
• [ ] Changes comply with WCAG 2.0 guidelines levels A and AA
• [ ] Changes to common UI patterns and interactions comply with WAI-ARIA best practices

Localization

• [ ] Changes include a UI text update in the Retail React App (which requires translation)