Fix: align POSIX hierarchy contract

Documentation/POSIX-Structure.md

@@ -1,5 +1,7 @@
 # POSIX Structure
 
+[Filetree Link](https://tree.nathanfriend.com/?s=(%27optiUs!(%27fancy!Yue~fullPath!fbq~YailingSlash!Yue~rootDot!fbq)~R(%27R%27PJ%20or%20OrganizatiU%20%7Bqrver%7DM*46layout6cNlog7packs7*pack37A2*enYies75W5A_standbUe7WA6HwH30LZ2teamw5teamGL5Z6FwF30LKTC058T5C7XFG5LXKXTXC7XI7I05QG5BN2*8QG5BN6Z04_dN_pJw*pJGlayout2L*KI70%27)~vEiU!%271%27)*%20%200M52_*3-%3Cslug%3E4qttings5**69M*7%2F08VG*V259.jsUA5manifestBQ25*schema25*dCchildrenEersFprojectG305HdepartmentI*YeeJEUbKhome2L*42M%5CnNataQitemRsource!Tacl2UonVfolderW*app37X55YtrZusE_90balqsews0%01wqb_ZYXWVUTRQNMLKJIHGFECBA987654320*)
+
 ``` markdown
 Personal or Organization (server)/
 ├── settings.json
@@ -26,6 +28,18 @@ Personal or Organization (server)/
 │   └── project-<slug>/
 │       ├── settings.json
 │       ├── home.json
+│       ├── acl.json
+│       ├── children/
+│       │   └── folder-<slug>/
+│       │       ├── folder.json
+│       │       ├── acl.json
+│       │       └── children/
+│       │           └── project-<slug>/
+│       │               ├── settings.json
+│       │               ├── home.json
+│       │               ├── acl.json
+│       │               ├── children/
+│       │               └── tree/
 │       └── tree/
 │           ├── item-<slug>/
 │           │   ├── item.json