Update UPGRADE7.md

Author: codeconsole

UPGRADE7.md

@@ -12,3 +12,18 @@ Experienced while upgrading modules for Grails 7
   - Fields with a public modifier were not returned with MetaClassImpl#getProperties() in groovy 3, but are now. 
 
 ## NOTE: This document is a draft and the explanations are only highlights and will be expanded further prior to release of 7.0.
+
+### Cool New Features
+- You can now @Scaffold Controllers and Services and virtually eliminate any boiler plate code.
+- Hello Exterminator, Good by bugs! Lot's of things started working... and working well! For instance, use of controller namespaces now work seemlessly.
+- Bootstrap 5.3.3 support. Saffolding and Fields tags now optionally support boostrap classes.
+- Priortization of AutoConfiguration over bean overriding.
+- Lightweight, Removal of numerous dependencies.
+- grails-bom overhaul for keeping depedencies up to date and in sync.
+- g:form now automatically provides csrf protection when Spring Security CSRF is enabled.
+- Massive decoupling of dependencies and cleanup between modules.  SiteMesh dependencies is no longer compiled into controllers fused between numerous modules. SiteMesh isn't even required to use Grails!
+- SiteMesh ahs been upgrade to SiteMesh 3!
+- Completely up to date modern stack that has been optimized for easier future transitions.
+- GSP can now be used OUTSIDE of Grails! see grails-boot
+- Works with Spring Security 6 out of the box. No plugin needed!
+- Tested and works with Java [17-23](https://github.com/grails/grails-core/blob/0549617f27aeb5b90b64797fa4147dde40fc9c86/.github/workflows/gradle.yml#L18)