refactor: Drop FsFile alias, use HalFile in downstream code (#2141)

src/main.cpp

@@ -237,14 +237,14 @@ void waitForPowerRelease() {
 constexpr char SLEEP_FRAME_FILE[] = "/.crosspoint/sleep_frame.bin";
 
 static void saveSleepFrameBuffer() {
-  FsFile file;
+  HalFile file;
   if (!Storage.openFileForWrite("SLP", SLEEP_FRAME_FILE, file)) return;
   file.write(renderer.getFrameBuffer(), renderer.getBufferSize());
   file.close();
 }
 
 static bool loadSleepFrameBuffer() {
-  FsFile file;
+  HalFile file;
   if (!Storage.openFileForRead("SLP", SLEEP_FRAME_FILE, file)) return false;
   const size_t bufferSize = display.getBufferSize();
   const size_t bytesRead = file.read(display.getFrameBuffer(), bufferSize);