Tightened the source code and README documentations in the library.

Sources/PlaydateKit/Graphics/Structures/Bitmap.Data.swift

@@ -1,14 +1,12 @@
 extension Graphics.Bitmap {
-    /// The bitmap's dimensions and row stride. Access the pixels themselves
-    /// with `withPixelData(_:)` and `withMaskData(_:)`.
+    /// A bitmap's layout. Read pixels with `withPixelData(_:)` and `withMaskData(_:)`.
     public struct Data: Sendable {
-        /// The bitmap's width, in pixels.
+        /// Width, in pixels.
         public let width: Int
-        /// The bitmap's height, in pixels.
+        /// Height, in pixels.
         public let height: Int
-        /// The stride of one row of pixel (and mask) data, in bytes.
+        /// Row stride of the pixel and mask data, in bytes.
         public let rowBytes: Int
-        /// Whether the bitmap has a mask.
         public let hasMask: Bool
     }
 }