feat: integrate postgres storage (#2604)

* chore: env config

* chore: get user workspace

* feat: enable postgres storage

* chore: add new env

* chore: add set env ffi

* chore: pass env before backend init

* chore: update

* fix: ci tests

* chore: commit the generate env file

* chore: remove unused import

frontend/appflowy_flutter/linux/flutter/dart_ffi/binding.h

@@ -14,3 +14,5 @@ int32_t set_stream_port(int64_t port);
 void link_me_please(void);
 
 void backend_log(int64_t level, const char *data);
+
+void set_env(const char *data);