[FEATURE] Page/popup/onboarding for repo rater

[amandamartin-dev]

Description

In addition to the issue open for docs, having a simple onboarding flow or video about what repo rater is and how it works would be nice. Something less dense than what the docs will offer and if it's a video can also serve as a way to "market" use of it as it would be a shareable resource.

Screenshots

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Additional information

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