Added database models

src/Portfolio.Shared/Models/Technology.cs

@@ -0,0 +1,22 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Portfolio.Shared.Models;
+
+public sealed class Technology {
+    
+    [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+    public int Id { get; init; }
+
+    [MaxLength(255)]
+    public required string Name { get; set; }
+
+    public TechnologyLevel Level { get; set; } = TechnologyLevel.Beginner;
+
+}
+
+public enum TechnologyLevel : byte {
+    Beginner = 0,
+    Intermediate = 1,
+    Professional = 2
+}