Add project files.

ConstructorAppUI/wwwroot/AdminTheme/build/scss/parts/_pages.scss

@@ -0,0 +1,14 @@
+//
+// Part: Pages
+//
+
+@import "../pages/mailbox";
+@import "../pages/lockscreen";
+@import "../pages/login_and_register";
+@import "../pages/404_500_errors";
+@import "../pages/invoice";
+@import "../pages/profile";
+@import "../pages/e-commerce";
+@import "../pages/projects";
+@import "../pages/iframe";
+@import "../pages/kanban";