Add safe area and document coordinate systems

Cargo.toml

@@ -149,6 +149,7 @@ objc2-foundation = { version = "0.2.2", features = [
     "NSDictionary",
     "NSDistributedNotificationCenter",
     "NSEnumerator",
+    "NSGeometry",
     "NSKeyValueObserving",
     "NSNotification",
     "NSObjCRuntime",
@@ -296,6 +297,7 @@ web_sys = { package = "web-sys", version = "0.3.70", features = [
     "FocusEvent",
     "HtmlCanvasElement",
     "HtmlElement",
+    "HtmlHtmlElement",
     "HtmlImageElement",
     "ImageBitmap",
     "ImageBitmapOptions",

docs/res/ATTRIBUTION.md

@@ -9,3 +9,10 @@ by [Tomiĉo] (https://commons.wikimedia.org/wiki/User:Tomi%C4%89o). It was
 originally released under the [CC-BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/deed.en)
 License. Minor modifications have been made by [John Nunley](https://github.com/notgull),
 which have been released under the same license as a derivative work.
+
+## `coordinate-systems*`
+
+These files are created by [Mads Marquart](https://github.com/madsmtm) using
+[draw.io](https://draw.io/), and compressed using [svgomg.net](https://svgomg.net/).
+
+They are licensed under the [CC-BY 4.0](https://creativecommons.org/licenses/by/4.0/) license.