Promote subsystem namespaces to the top level of the module

System, Display, Graphics, Sprite, Sound, File, JSON, Lua, Scoreboards,
Network, Rect, SystemEvent, and AccessReply now live at module scope
instead of being nested in the Playdate enum; consumers write
System.log(...) instead of Playdate.System.log(...), and can qualify with
the module name (PlayDate.System) on collision. The Playdate enum remains
only as the raw C API bootstrap (initialize(with:), api, apiPointer), and
Playdate.Error is renamed PlaydateError so no top-level type shadows
Swift.Error.

Breaking change for any existing consumers.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Sources/PlayDate/SoundSource.swift

@@ -5,7 +5,7 @@
 
 internal import CPlaydate
 
-extension Playdate.Sound {
+extension Sound {
     /// A source of audio: the base class of `FilePlayer`, `SamplePlayer`,
     /// `Synth`, `DelayLineTap`, and `CallbackSource`. Wraps `SoundSource`.
     public class Source {
@@ -116,7 +116,7 @@ extension Playdate.Sound {
         }
 
         /// Creates a player and loads the audio file at `path`.
-        public convenience init(path: String) throws(Playdate.Error) {
+        public convenience init(path: String) throws(PlaydateError) {
             self.init()
             try load(path: path)
         }
@@ -128,12 +128,12 @@ extension Playdate.Sound {
         }
 
         /// Prepares the player to stream the file at `path`.
-        public func load(path: String) throws(Playdate.Error) {
+        public func load(path: String) throws(PlaydateError) {
             let loaded = path.withPlaydateCString {
                 FilePlayer.api.loadIntoPlayer.unsafelyUnwrapped(pointer, $0) != 0
             }
             if !loaded {
-                throw Playdate.Error(message: "unable to load audio file: \(path)")
+                throw PlaydateError(message: "unable to load audio file: \(path)")
             }
         }
 
@@ -266,10 +266,10 @@ extension Playdate.Sound {
         }
 
         /// Loads the wav or aiff file at `path`.
-        public convenience init(path: String) throws(Playdate.Error) {
+        public convenience init(path: String) throws(PlaydateError) {
             let pointer = path.withPlaydateCString { AudioSample.api.load.unsafelyUnwrapped($0) }
             guard let pointer else {
-                throw Playdate.Error(message: "unable to load sample: \(path)")
+                throw PlaydateError(message: "unable to load sample: \(path)")
             }
             self.init(pointer: pointer, isOwned: true)
         }
@@ -294,12 +294,12 @@ extension Playdate.Sound {
         }
 
         /// Loads the file at `path` into this sample's buffer.
-        public func load(path: String) throws(Playdate.Error) {
+        public func load(path: String) throws(PlaydateError) {
             let loaded = path.withPlaydateCString {
                 AudioSample.api.loadIntoSample.unsafelyUnwrapped(pointer, $0) != 0
             }
             if !loaded {
-                throw Playdate.Error(message: "unable to load sample: \(path)")
+                throw PlaydateError(message: "unable to load sample: \(path)")
             }
         }
 
@@ -346,7 +346,7 @@ extension Playdate.Sound {
         }
 
         /// Creates a player for the sample at `path`.
-        public convenience init(path: String) throws(Playdate.Error) {
+        public convenience init(path: String) throws(PlaydateError) {
             self.init()
             sample = try AudioSample(path: path)
         }