Initial commit for teams module

lib/models/team_member.dart

@@ -0,0 +1,13 @@
+class TeamMember {
+  TeamMember({required this.teamId, required this.userId});
+
+  final String teamId;
+  final String userId;
+
+  factory TeamMember.fromMap(Map<String, dynamic> map) {
+    return TeamMember(
+      teamId: map['team_id'] as String,
+      userId: map['user_id'] as String,
+    );
+  }
+}