initial work to split into dart_filament and flutter_filament

flutter_filament/lib/filament/utils/hardware_keyboard_poll.dart

@@ -0,0 +1,40 @@
+import 'dart:async';
+
+import 'package:flutter/services.dart';
+import 'package:flutter_filament/filament/entities/entity_transform_controller.dart';
+
+class HardwareKeyboardPoll {
+  final EntityTransformController _controller;
+  late Timer _timer;
+  HardwareKeyboardPoll(this._controller) {
+    _timer = Timer.periodic(const Duration(milliseconds: 16), (_) {
+      if (RawKeyboard.instance.keysPressed.contains(LogicalKeyboardKey.keyW)) {
+        _controller.forwardPressed();
+      } else {
+        _controller.forwardReleased();
+      }
+
+      if (RawKeyboard.instance.keysPressed.contains(LogicalKeyboardKey.keyS)) {
+        _controller.backPressed();
+      } else {
+        _controller.backReleased();
+      }
+
+      if (RawKeyboard.instance.keysPressed.contains(LogicalKeyboardKey.keyA)) {
+        _controller.strafeLeftPressed();
+      } else {
+        _controller.strafeLeftReleased();
+      }
+
+      if (RawKeyboard.instance.keysPressed.contains(LogicalKeyboardKey.keyD)) {
+        _controller.strafeRightPressed();
+      } else {
+        _controller.strafeRightReleased();
+      }
+    });
+  }
+
+  void dispose() {
+    _timer.cancel();
+  }
+}