Define and review GitHub organization configuration settings

[jiekang]

Similar to adoptium/infrastructure#2549 a GitHub organization has configuration for which expected settings should be defined to ensure it is consistent and secure.

Organization settings include (but are not limited to):

• Member privileges
• Moderation settings
• Repository defaults
• GitHub Actions rules
• Webhooks
• Authentication requirements
• Code security settings
• Verified and approved domains
• Secrets
• Third-party application access policies
• GitHub Apps permissions

The first step is to define and understand the expected settings for the Adoptium GitHub organization. The second step is to adjust it as needed.