Add an xcaddy like builder that can be used to build a custom proxy. https://github.com/caddyserver/xcaddy By providing a list of packages with middleware, runtimes, session backends, embeddings, etc. essentially everything that uses registry pattern. It should generate code similar to our cmd with all the imports and build it. It must have multiple output options: proxy, operator (must regenerate the CRDs and types to include only what’s necessary), caddy plugin, kong plugin.