Revert "Rename everything filcnaplo-related to refilc"

This reverts commit d1a9625d93.

filcnaplo/macos/Runner/MainFlutterWindow.swift

@@ -0,0 +1,19 @@
+import Cocoa
+import FlutterMacOS
+import flutter_acrylic
+
+class MainFlutterWindow: NSWindow {
+  override func awakeFromNib() {
+      let blurryContainerViewController = BlurryContainerViewController()
+    let windowFrame = self.frame
+    self.contentViewController = blurryContainerViewController
+    self.setFrame(windowFrame, display: true)
+
+    /* Initialize the flutter_acrylic plugin */
+    MainFlutterWindowManipulator.start(mainFlutterWindow: self)
+
+    RegisterGeneratedPlugins(registry: blurryContainerViewController.flutterViewController)
+
+    super.awakeFromNib()
+  }
+}