feat: Adds enterprise settings resources to the provider

[nickfloyd]

Resolves #1199

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Before the change?

Prior to this change we were missing some enterprise settings resources in the provider

After the change?

Adds the following enterprise settings resources to the provider
✅ Read-only workflow permissions by default - Available via DefaultWorkflowPermissionEnterprise
✅ Contributor approval permissions - Available via ContributorApprovalPermissions
✅ Advanced Security - Available via EnterpriseSecurityAnalysisSettings
✅ Secret scanning - Available via EnableDisableSecurityFeature
✅ Secret scanning push protection - Available via EnableDisableSecurityFeature
✅ Self-hosted runner permissions - Available via SelfHostRunnerPermissionsEnterprise

Pull request checklist

• Schema migrations have been created if needed (example)
• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)

Does this introduce a breaking change?

Please see our docs on breaking changes to help!

• Yes
• No

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[stevehipwell]

@nickfloyd I think this resource should be broken up to be a 1-2-1 mapping between API calls and TF resources. This is the idiomatic TF pattern and puts the least pressure on the GitHub API.

[nickfloyd]

@nickfloyd I think this resource should be broken up to be a 1-2-1 mapping between API calls and TF resources. This is the idiomatic TF pattern and puts the least pressure on the GitHub API.

Let me put together something next week and I'll cc you to make sure I address your thoughts as expected. ❤️