Added optimized device builds and harden the Embedded toolchain setup in both the PlayDate bindings and HelloPlayDate example targets.

Sources/PlayDate/GraphicsVideo.swift

@@ -60,7 +60,10 @@ extension Graphics {
         /// Renders frame `frame` into the current context.
         public func renderFrame(_ frame: Int) throws(PlaydateError) {
             guard videoAPI.pointee.renderFrame.unsafelyUnwrapped(pointer, Int32(frame)) != 0 else {
-                throw PlaydateError(message: error ?? "unable to render frame \(frame)")
+                // Static message: the caller knows the frame it passed, and
+                // interpolating it would pull integer formatting machinery
+                // into the device binary.
+                throw PlaydateError(message: error ?? "unable to render frame")
             }
         }
 

Sources/PlayDate/JSON.swift

@@ -170,8 +170,10 @@ extension JSON {
         return try decode(file: file)
     }
 
+    // Static message: interpolating the line number would pull integer
+    // formatting machinery into every device binary that decodes JSON.
     private static func decodeError(_ context: DecodeContext) -> PlaydateError {
-        PlaydateError(message: "\(context.errorMessage ?? "JSON decode failed") (line \(context.errorLine))")
+        PlaydateError(message: context.errorMessage ?? "JSON decode failed")
     }
 
     // MARK: - Encoding