Use files instead of UDP for signalling. (#585)

project.yml

@@ -46,7 +46,7 @@ packages:
     path: DesignKit
   AnalyticsEvents:
     url: https://github.com/matrix-org/matrix-analytics-events
-    branch: main
+    exactVersion: 0.4.0
   AppAuth:
     url: https://github.com/openid/AppAuth-iOS
     majorVersion: 1.5.0
@@ -65,6 +65,9 @@ packages:
   Kingfisher:
     url: https://github.com/onevcat/Kingfisher
     majorVersion: 7.2.0
+  KZFileWatchers:
+    url: https://github.com/krzysztofzablocki/KZFileWatchers
+    branch: master
   Introspect:
     url: https://github.com/siteline/SwiftUI-Introspect
     majorVersion: 0.1.4