Exposes raw, global, and computed report flags for every openresty per-app property and allows those properties to be set with `--global`, so external tooling can distinguish a property that was never set from one left at its built-in default. The computed value resolves the per-app value first, then the global value, then the default. Also corrects `client-header-timeout` which read the `client-body-timeout` key and sets the computed `client-max-body-size` default to `1m`.
`openresty:set <app>` previously accepted per-app writes for properties whose readers only consult the global store, so `:set myapp image foo` printed a success message while `:report myapp` kept showing the global default. The per-app form is now rejected with `The key '<key>' can only be set globally`, matching the behavior introduced for `caddy`, `haproxy`, and `traefik` in #8602.
This plugin is mostly compatible with the nginx plugin, but runs the proxy within a docker container. Users do not have direct access to add custom openresty configuration at this time, but instead receive the ability to setup automatic ssl on first request via letsencrypt integration.
