app/dbus: manage dbus proxy and pass address to child

This commit adds code that starts and registers the D-Bus proxy, as well as cleanup code that tracks and closes the daemon once our child exits. A few more flags were added to pass D-Bus config to xdg-dbus-proxy.

Signed-off-by: Ophestra Umiker <cat@ophivana.moe>

internal/state/register.go

@@ -1,9 +1,14 @@
 package state
 
+import "git.ophivana.moe/cat/fortify/dbus"
+
 var (
 	cleanupCandidate  []string
 	enablements       *Enablements
 	xcbActionComplete bool
+
+	dbusProxy *dbus.Proxy
+	dbusDone  *chan struct{}
 )
 
 func RegisterRevertPath(p string) {
@@ -23,3 +28,8 @@ func XcbActionComplete() {
 	}
 	xcbActionComplete = true
 }
+
+func RegisterDBus(p *dbus.Proxy, done *chan struct{}) {
+	dbusProxy = p
+	dbusDone = done
+}