feat(integration): GitHub GraphQL lookup of user contributions to non-user owned repositories

[Luceium]

Proposed Changes

Adds an integration to use GitHub's graphQL API to fetch a user's contributions.

Linked Issues

An agentverse issue was encountered while testing and uploading the integration as a function to Delta V.
The issue is documented here:
fetchai/agentverse#59

Types of changes

What type of change does this pull request make (put an x in the boxes that apply)?

• Bug fix (non-breaking change that fixes an issue).
• New feature added (non-breaking change that adds functionality).
• Breaking change (fix or feature that would cause existing functionality to stop working as expected).
• Documentation update.
• Something else (e.g., tests, scripts, example, deployment, infrastructure).

Checklist

Put an x in the boxes that apply:

• I have read the CONTRIBUTING guide
• Checks and tests pass locally

If applicable

• I have added tests that prove my fix is effective or that my feature works
• I have checked that code coverage does not decrease
• I have added/updated the documentation