Finished implementing xp shop. It allows users to buy frames and backgrounds if the user enables the feature in data/xp.yml. It can also be available only to patrons

src/NadekoBot/Migrations/Sqlite/20220725112348_xpitemshop.cs

@@ -0,0 +1,42 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace NadekoBot.Migrations
+{
+    public partial class xpitemshop : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "XpShopOwnedItem",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    UserId = table.Column<ulong>(type: "INTEGER", nullable: false),
+                    ItemType = table.Column<int>(type: "INTEGER", nullable: false),
+                    IsUsing = table.Column<bool>(type: "INTEGER", nullable: false),
+                    ItemKey = table.Column<string>(type: "TEXT", nullable: false),
+                    DateAdded = table.Column<DateTime>(type: "TEXT", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_XpShopOwnedItem", x => x.Id);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_XpShopOwnedItem_UserId_ItemType_ItemKey",
+                table: "XpShopOwnedItem",
+                columns: new[] { "UserId", "ItemType", "ItemKey" },
+                unique: true);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "XpShopOwnedItem");
+        }
+    }
+}