Add internal Geo Developer Console
What does this MR do and why?
Adds Geo Developer Console to save Geo and Support engineers' time when debugging and troubleshooting replication and verification in the internals of our application. This is not user-facing (see the added README.md).
Related to #427057. This MR creates a skeleton for engineers to hang snippets.
MR acceptance checklist
Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.
Edited by Michael Kozono