Refactor logging system to use LOG_* macros

- Updated logging calls in main.cc, rom.cc, and test_manager.cc to utilize the new LOG_* macros for consistency and improved readability.
- Removed deprecated util::logf function and replaced its usage with appropriate logging macros.
- Enhanced logging in TestManager to provide more detailed information about ROM state and testing processes.
- Cleaned up commented-out logf calls in room.cc to streamline the code.
- Adjusted LogManager to support general logging through a new logf function for non-category specific messages.

src/app/core/window.cc

@@ -64,7 +64,8 @@ absl::Status CreateWindow(Window& window, int flags) {
   auto status = theme_manager.LoadTheme("YAZE Classic");
   if (!status.ok()) {
     // Theme system failed, stick with original ColorsYaze()
-    util::logf("Theme system failed, using original ColorsYaze(): %s", status.message().data());
+    LOG_WARN("Window", "Theme system failed, using original ColorsYaze(): %s",
+             status.message().data());
   }
 
   const int audio_frequency = 48000;