Github API call return headers

In the return headers from git hub api there is some information that is useful.

- x-ratelimit-limit
- x-ratelimit-remaining
- x-ratelimit-reset
- x-ratelimit-used

These should be made available to a front end component for display

Start by tracing the GitHub API request and the frontend component that displays search results; no specific files or tests are named in the issue. Make the listed rate-limit response headers available to the frontend and display them there, then verify the values appear after a search.

Written by the indexing model from the issue text.