core/wayland: thread-safety meta fixes + cleanups + hypr workaround

- fork go-wayland/client and modify to make it thread-safe internally
- use sync.Map and atomic values in many places to cut down on mutex
  boilerplate
- do not create extworkspace client unless explicitly requested

core/internal/server/network/testing.go

@@ -6,10 +6,9 @@ func NewTestManager(backend Backend, state *NetworkState) *Manager {
 		state = &NetworkState{}
 	}
 	return &Manager{
-		backend:     backend,
-		state:       state,
-		subscribers: make(map[string]chan NetworkState),
-		stopChan:    make(chan struct{}),
-		dirty:       make(chan struct{}, 1),
+		backend:  backend,
+		state:    state,
+		stopChan: make(chan struct{}),
+		dirty:    make(chan struct{}, 1),
 	}
 }