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/Persistence/Repositories/RoleRepository.cs

@@ -0,0 +1,28 @@
+using Microsoft.EntityFrameworkCore;
+using Mws.Application.Common.Repositories;
+using Mws.Domain.Roles;
+
+namespace Mws.Infrastructure.Persistence.Repositories;
+
+public class RoleRepository(AppDbContext db) : RepositoryBase<Role>(db), IRoleRepository
+{
+    public Task<List<Role>> GetAllWithPermissionsAsync(CancellationToken ct = default) =>
+        Set.Include(r => r.Permissions).OrderBy(r => r.Name).ToListAsync(ct);
+
+    public Task<Role?> GetByIdWithPermissionsAsync(Guid id, CancellationToken ct = default) =>
+        Set.Include(r => r.Permissions).FirstOrDefaultAsync(r => r.Id == id, ct);
+
+    public Task<Role?> GetByIdAsync(Guid id, CancellationToken ct = default) =>
+        Set.FirstOrDefaultAsync(r => r.Id == id, ct);
+
+    public Task<bool> ExistsByNameAsync(string name, Guid? excludeId, CancellationToken ct = default) =>
+        Set.AnyAsync(r => r.Name == name && (excludeId == null || r.Id != excludeId), ct);
+
+    public Task<RolePermission?> GetPermissionAsync(Guid roleId, string screen, CancellationToken ct = default) =>
+        Db.RolePermissions.FirstOrDefaultAsync(p => p.RoleId == roleId && p.Screen == screen, ct);
+
+    public Task<Dictionary<string, RolePermission>> GetPermissionsAsync(Guid roleId, CancellationToken ct = default) =>
+        Db.RolePermissions.Where(p => p.RoleId == roleId).ToDictionaryAsync(p => p.Screen, ct);
+
+    public void RemovePermissions(IEnumerable<RolePermission> permissions) => Db.RolePermissions.RemoveRange(permissions);
+}