[FEAT]: Allow usage of enterprise app installation

### Describe the need

In an enterprise, it should be possible to manage various enterprise level aspects, including creation of organizations, with an enterprise scoped app installation.

This will also enable (hopefully) future resources for managing other enterprise aspects like enterprise teams, enterprise custom roles, etc.

Currently, this fails due to the reliance on endpoints not available with enterprise-scoped app installations.

### SDK Version

_No response_

### API Version

_No response_

### Relevant log output

```shell
Planning failed. OpenTofu encountered an error while generating this plan.

╷
│ Error: Error
│
│ with provider["registry.opentofu.org/integrations/github"],
│ on provider.tf line 11, in provider "github":
│ 11: provider "github" {
│
│ GET https://api.github.com/user: 403 Resource not accessible by integration
│ []
```

### Code of Conduct

- [x] I agree to follow this project's Code of Conduct