Document "run" installation profile via CLI

[ThomasVitale]

• Document local installation with kind via CLI
• Document installation on cloud provider via CLI
• Document developer use case with application images from public registry
• Document developer use case with application images from private registry (add pull secret to kadras-packages namespace and SecretExport)
• Verify behaviour when Secrets are updated

Notes

• Architecture
• Install (online, air-gapped, local)
• Configuration
• Upgrade
• Uninstall
• Troubleshooting