🩹 [Patch]: Let `Connect-GitHubAccount` be able to pass the context to pipeline

### Describe the change

Add a -PassThru option for the `Connect-GitHubAccount` function.

Allows to run stuff like:

```pwsh
$context = Connect-GitHub -PassThru -NoDefault
Get-GitHubZen -Context $context
$context | Disconnect-GitHub
```