* fix(route): use GraphQL query in GitHub trending
Uses GraphQL to get desired repository data instead of attempting to
query it from the repository page.
* docs: add `selfhost` attribute to GitHub trending
* fix(route): add Open Graph image to GitHub trending
Adds Open Graph image for each repository to the GitHub trending feed.
* chore(route): address pull request feedback
- Refactors page request call to make it more terse
- Adds art template for trending description
- Updates maintainers for '/trending/:since/:language?/:spoken_language?'