Added .exprtoggleglobal / .extg which can be used to toggle usage of global expressions on the server

src/NadekoBot/Migrations/PostgreSql/20221021192807_toggle-global-expressions.cs

@@ -0,0 +1,26 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace NadekoBot.Migrations.PostgreSql
+{
+    public partial class toggleglobalexpressions : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<bool>(
+                name: "disableglobalexpressions",
+                table: "guildconfigs",
+                type: "boolean",
+                nullable: false,
+                defaultValue: false);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "disableglobalexpressions",
+                table: "guildconfigs");
+        }
+    }
+}