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.application/Accounts/IAccountService.cs

@@ -0,0 +1,10 @@
+namespace Mws.Application.Accounts;
+
+public interface IAccountService
+{
+    Task<List<AccountDto>> GetAccountsAsync(Guid actorUserId, string? term, CancellationToken ct = default);
+    Task<AccountDto> CreateAccountAsync(Guid actorUserId, CreateAccountRequest request, CancellationToken ct = default);
+    Task<AccountDto> UpdateAccountAsync(Guid actorUserId, Guid id, UpdateAccountRequest request, CancellationToken ct = default);
+    Task DeleteAccountAsync(Guid actorUserId, Guid id, CancellationToken ct = default);
+    Task ResetPasswordAsync(Guid actorUserId, Guid id, ResetPasswordRequest request, CancellationToken ct = default);
+}