Added infrastructure and first database design

Nexus.Infrastructure/Persistence/ProjectConfiguration.cs

@@ -0,0 +1,20 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using Nexus.Domain.Entities;
+
+namespace Nexus.Infrastructure.Persistence.Configurations;
+
+public class ProjectConfiguration : IEntityTypeConfiguration<Project>
+{
+    public void Configure(EntityTypeBuilder<Project> builder)
+    {
+        builder.HasKey(x => x.Id);
+
+        builder.Property(x => x.Name)
+            .IsRequired()
+            .HasMaxLength(200);
+
+        builder.Property(x => x.CreatedAt)
+            .IsRequired();
+    }
+}