Added EF and DB to the core, crude demo in the UI

WinWARP.Core/Models/Entities/Server.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Text;
+
+namespace WinWARP.Core.Models.Entities;
+
+public class Server
+{
+    [Key]
+    public int Id
+    {
+        get; set;
+    }
+
+
+    public int SubscriptionId
+    {
+        get; set;
+    }
+
+}

WinWARP.Core/Models/Entities/Subscription.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Text;
+
+namespace WinWARP.Core.Models.Entities;
+
+public class Subscription
+{
+    [Key]
+    public int Id
+    {
+        get; set;
+    }
+
+    [Required]
+    [StringLength(100)]
+    public string Link
+    {
+        get; set;
+    }
+
+    [StringLength(100)]
+    public string WebPage
+    {
+        get; set;
+    } = string.Empty;
+
+    [StringLength(100)]
+    public string DefaultTitle
+    {
+        get; set;
+    } = string.Empty;
+
+    public int DefaultUpdateInterval
+    {
+        get; set;
+    } = 1;
+
+    [StringLength(100)]
+    public string Title
+    {
+        get; set;
+    } = string.Empty;
+
+    public int UpdateInterval
+    {
+        get; set;
+    } = 1;
+
+    [StringLength(100)]
+    public string SupportURL
+    {
+        get; set;
+    } = string.Empty;
+}