[WIP] Add repo#show

[chalkos]

This should fix #3. I tried to implement this based on the comments in that issue.

• route, controller and view to show pull request information
• show relevant information for the PRs
• feedback and discussion

[chalkos]

It looks like this:

(all PRs are shown in the screenshot, not just open ones; the actual code only shows open PRs, but I wanted to list more PRs)

[indirect]

This looks like a good start on showing the status of PRs!

I am okay with using the database as a cache, updated whenever new information arrives in a webhook, and updated by polling when needed to refresh the page.

[chalkos]

I agree with the cache and when to update it. That seems to be a good solution UX-wise.

[chalkos]

@indirect @segiddins
Could I implement a simple version (without caching and updating information) of this and then later add that functionality? It seems to me like this page is needed, but the extra functionality is not really needed for now.

I would just make all the needed github API requests when loading the page.