Adicionar GitHub no LoginCidadão [$50]

[uira]

• [ ] Criar uma página de Integrações no Admin, para configurar quais vão ser ativadas, e quais vão aparecer na home ou só no perfil.

--- There is a **[$50 open bounty](https://www.bountysource.com/issues/38479016-adicionar-github-no-logincidadao?utm_campaign=plugin&utm_content=tracker%2F43141407&utm_medium=issues&utm_source=github)** on this issue. Add to the bounty at [Bountysource](https://www.bountysource.com/?utm_campaign=plugin&utm_content=tracker%2F43141407&utm_medium=issues&utm_source=github).