feat(affiliate): add referral controller

[fairlighteth]

Summary

<<if there's an issue>>Fixes #issueNumber

High-level description of what your changes are accomplishing

Add screenshots if applicable. Images are nice :)

To Test

1. <> Open the page about

• <<What to expect?>> Verify it contains about information...
• Checkbox Style list of things a QA person could verify, i.e.
• Should display Text Input our storybook
• Input should not accept Numbers

2. <> ...

Background

Optional: Give background information for changes you've made, that might be difficult to explain via comments

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/affiliate-ui-5

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