I'm going to fill this in with an actual plan, but the rough goal is to do the following:

Move all statically registered components (filters, access loggers, stats, etc.) into an "extensions" directory. Under this directory we would have "experimental" and "stable." This would also more easily allow us to compile extensions in and out more easily.

The goal here is to be able to more clearly separate out extensions from core, and have discrete OWNERS for extensions.

cc @envoyproxy/maintainers