Commit MWS backend source tree

The ASP.NET Core solution (mws.api/mws.application/mws.domain/
mws.infrastructure) existed only as untracked working files. Adding
it to version control, plus a .gitignore for build output and local
tooling directories, so the CQRS/mediator refactor plan has a real
git history to branch and diff against.

mws.domain/Projects/Project.cs

@@ -0,0 +1,19 @@
+namespace Mws.Domain.Projects;
+
+public enum ProjectStatus
+{
+    Active = 1,
+    Archived = 2,
+}
+
+public class Project
+{
+    public Guid Id { get; set; }
+    public string Name { get; set; } = string.Empty;
+    public string? Description { get; set; }
+    public ProjectStatus Status { get; set; } = ProjectStatus.Active;
+    public DateTime CreatedAt { get; set; }
+    public DateTime UpdatedAt { get; set; }
+
+    public List<ProjectMember> Members { get; set; } = [];
+}