Update developer notes

DEVELOPER-NOTES.md

@@ -1,4 +1,4 @@
-Project Structure
+## Project Structure
 
 - `common` submodule contains shared code for all platforms.
   - It contains the interfaces and abstractions for
@@ -6,11 +6,11 @@ Project Structure
     - Scheduling
     - Players
     - Blocks
-    - World
+    - Worlds/Levels
     - The Server
   - In addition to the interfaces, the code also contains the implementations for
     - Commands
-      - Commands use Brigadier with Reflection to handle version differences. Simply call our command code in common by registering KnockBackSyncCommand.build() and implementing CommandOperations
+      - Commands use incendio's `cloud` command system. All you have to do to add platform support is to create a CommandManager and call register(). 
     - Handling Events
     - Gathering Statistics
 - `fabric` contains code for latest fabric version (currently 1.21)
@@ -21,6 +21,7 @@ If you want to add support for a new platform, simply make a new submodule and i
 - Checking for Permissions
 - Listening for events and calling the right handler
 - Players + Blocks + World + Server
+- Metrics
 
 You will need to handle events when Players:
 - join/leave
@@ -31,9 +32,4 @@ If you find your platform is lacking events, take a look at how the PlayerVeloci
 
 
 ## List of version and platform-specific caveats
-- Runnable and manual ping does not work on fabric right now due b/c packetevents. Ping measurement will be less accurate
-
-- Command System
-  - context.getSource().sendSuccess() takes a Supplier<Component> in > 1.19.4
-  - context.getSource().sendSuccess() takes a Component in <= 1.19.4 
-  - Component.literal() does not exist in <= 1.18.2
+- Runnable and manual ping does not work on fabric right now due b/c packetevents. Ping measurement will be less accurate