Fix ghostty performance. Improve keyboard and input mode handling

CommandNotch/Vendor/GhosttyKit.xcframework/ios-arm64/Headers/module.modulemap

@@ -0,0 +1,7 @@
+// This makes Ghostty available to the XCode build for the macOS app.
+// We append "Kit" to it not to be cute, but because targets have to have
+// unique names and we use Ghostty for other things.
+module GhosttyKit {
+    umbrella header "ghostty.h"
+    export *
+}