[ox] Add Project Structure section to docs

deps/ox/ox-docs.md

@@ -1,17 +1,33 @@
 
 # Ox Docs
 
+## Project Structure
+
+All components have a platform indicator next to them:
+
+    (OB) - OS, Bare Metal
+    (-B) - Bare Metal
+    (O-) - OS
+
+* Ox - Library of things useful for portable bare metal and userland code. Not really that external...
+    * clargs - Command Line Args processing (OB)
+    * claw - Reads and writes Metal or Organic Claw with header to indicate which
+    * event - Qt-like signal system (OB)
+    * fs - file system (OB)
+        * logconn - connects logging to Bullock (O-)
+    * mc - Metal Claw serialization, builds on model (OB)
+    * oc - Organic Claw serialization (wrapper around JsonCpp), builds on model (O-)
+    * model - Data structure modelling (OB)
+        * preloader - library for handling preloading of data (OB)
+    * std - Standard-ish Library with a lot missing and some things added (OB)
+
 ## Systems
 
 ### Error Handling
 
-The GBA build has exceptions disabled.
-Instead of throwing exceptions, all engine code must return ```ox::Error```s.
-For the sake of consistency, try to stick to ```ox::Error``` in non-engine code
-as well, but non-engine code is free to use exceptions when they make sense.
-Nostalgia and Ox both use ```ox::Error``` to report errors. ```ox::Error``` is
-a struct that has overloaded operators to behave like an integer error code,
-plus some extra fields to enhance debuggability.
+Ox provides ```ox::Error``` to report errors.
+```ox::Error``` is a struct that has overloaded operators to behave like an
+integer error code, plus some extra fields to enhance debuggability.
 If instantiated through the ```OxError(x)``` macro, it will also include the
 file and line of the error.
 The ```OxError(x)``` macro should only be used for the initial instantiation of
@@ -87,9 +103,6 @@ back up the call stack, ```oxReturnError```, ```oxThrowError```, and
 ```oxReturnError``` is by far the more helpful of the two.
 ```oxReturnError``` will return an ```ox::Error``` if it is not 0 and
 ```oxThrowError``` will throw an ```ox::Error``` if it is not 0.
-Because exceptions are disabled for GBA builds and thus cannot be used in the
-engine, ```oxThrowError``` is  only really useful at the boundary between
-engine libraries and Nostalgia Studio.
 
 Since ```ox::Error``` is always nodiscard, you must do something with them.
 In rare cases, you may not have anything you can do with them or you may know
@@ -370,9 +383,6 @@ That reads:
 * Type ID is net.drinkingtea.nostalgia.core.NostalgiaPalette
 * Type version is 1
 
-Except when the data is exported for loading on the GBA, Claw is always used as
-a wrapper around the bare formats.
-
 #### Metal Claw Example
 
 ##### Read