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.infrastructure/Authentication/BcryptPasswordHasher.cs

@@ -0,0 +1,10 @@
+using Mws.Application.Auth;
+
+namespace Mws.Infrastructure.Authentication;
+
+public class BcryptPasswordHasher : IPasswordHasher
+{
+    public string Hash(string password) => BCrypt.Net.BCrypt.HashPassword(password, BCrypt.Net.BCrypt.GenerateSalt());
+
+    public bool Verify(string password, string hash) => BCrypt.Net.BCrypt.Verify(password, hash);
+}