Add "Edit this page on GitHub" functionality for UDR

[im2nguyen]

🔗 Relevant links

This PR adds githubFileUrl to UDR, giving it feature parity with existing learn-api. We need to merge the companion api change in UDR that adds githubFile to the specific docs api.

• Preview link 🔎
• Asana task 🎟️

🗒️ What

🤷 Why

🛠️ How

📸 Design Screenshots

🧪 Testing

1. Checkout this PR and create a local image dev-portal:github-link.
2. Checkout web-unified-docs PR, update docker-compose to use local dev-portal image instead of hashicorp/dev-portal.
3. Start UDR with make.
4. Go to http://localhost:3000/terraform/plugin/framework/resources and confirm "Edit this page on GitHub" at the bottom of the page.
5. Click on link to confirm it takes you to the correct URL.
6. Go to http://localhost:3000/terraform/plugin/framework/v0.11.x (different version), click "Edit this page on GitHub" and confirm that it takes you to the correct versioned URL.

💭 Anything else?

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Name	Status	Preview	Comments	Updated (UTC)
dev-portal	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 19, 2025 6:11pm

[github-actions]

📦 Next.js Bundle Analysis

This analysis was generated by the next.js bundle analysis action 🤖

This PR introduced no changes to the javascript bundle 🙌

[RubenSandwich]

🚢