start adding login flow

lib/models/homeserver.dart

@@ -0,0 +1,12 @@
+import "package:freezed_annotation/freezed_annotation.dart";
+part "homeserver.freezed.dart";
+
+@freezed
+abstract class Homeserver with _$Homeserver {
+  const factory Homeserver({
+    required String name,
+    required String description,
+    required Uri url,
+    required String iconUrl,
+  }) = _Homeserver;
+}