Feature/tor health checks (#426)

* wip

* wraps up core tor health check feature, still need to fix the boundaries with the rest of embassyd

* need to please borrow checker

* please the borrow checker

* wire it in

* finishes the feature

* Apply suggestions from code review

* fixes tor restart functionality

* makes tor replacement more resilient, adds embassyd service in init and replace

appmgr/src/lib.rs

@@ -22,6 +22,7 @@ pub mod backup;
 pub mod config;
 pub mod context;
 pub mod control;
+pub mod daemon;
 pub mod db;
 pub mod dependencies;
 pub mod developer;