Added .shopreq - Shop items can now have a role requirement in order to purchase. Added .shopbuy alias for .buy

src/NadekoBot/Migrations/Mysql/20220913192520_shop-role-req.cs

@@ -0,0 +1,25 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace NadekoBot.Migrations.Mysql
+{
+    public partial class shoprolereq : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<ulong>(
+                name: "rolerequirement",
+                table: "shopentry",
+                type: "bigint unsigned",
+                nullable: true);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "rolerequirement",
+                table: "shopentry");
+        }
+    }
+}