Convert unimplemented design chapters into draftsa

src/SUMMARY.md

@@ -4,11 +4,11 @@
 
 - [Development](development/README.md)
     - [Understanding the Design Goals](development/design/README.md)
-        - [Actor System](development/design/actor.md)
-        - [Security Features](development/design/security.md)
-        - [Microkernel](development/design/kernel.md)
-        - [GUI](development/design/gui.md)
-        - [Filesystem](development/design/filesystem.md)
+        - [Actor System]()
+        - [Security Features]()
+        - [Microkernel]()
+        - [GUI]()
+        - [Filesystem]()
     - [Configuring a Build Environment](development/environment.md)
     - [Development Workflow](development/workflow.md)
 - [Using the OS](user/README.md)