Share env vars client-side using @Public decorator (#6627)

* fix: public env vars using decorator

* fix: relocate

* fix: use env.public

* fix: register public env vars across plugins

* fix: test

* fix: tsc

* fix: mark remaining ones as public

* fix: move oidc ones to plugin

* fix: prevent overwrite

* fix: review

server/test/setup.ts

@@ -1,3 +1,4 @@
+import "reflect-metadata";
 import sharedEnv from "@shared/env";
 import env from "@server/env";
 import Redis from "@server/storage/redis";