refactor(emulator): enhance input handling and audio resampling features

- Renamed `turbo_mode()` to `is_turbo_mode()` for clarity in the Emulator class.
- Improved input handling in the Snes class by adding button state management and ensuring proper initialization of input controllers.
- Implemented multiple audio resampling methods (linear, cosine, cubic) in the Dsp class, allowing for enhanced audio quality during playback.
- Updated the user interface to include options for selecting audio interpolation methods and added keyboard shortcuts for emulator controls.

Benefits:
- Improved code readability and maintainability through clearer method naming and structured input management.
- Enhanced audio playback quality with new resampling techniques.
- Streamlined user experience with added UI features for audio settings and keyboard shortcuts.

src/app/emu/audio/dsp.h

@@ -7,6 +7,12 @@
 namespace yaze {
 namespace emu {
 
+enum class InterpolationType {
+  Linear,
+  Cosine,
+  Cubic,
+};
+
 typedef struct DspChannel {
   // pitch
   uint16_t pitch;
@@ -104,6 +110,8 @@ class Dsp {
 
   void GetSamples(int16_t* sample_data, int samples_per_frame, bool pal_timing);
 
+  InterpolationType interpolation_type = InterpolationType::Linear;
+
  private:
   // sample ring buffer (1024 samples, *2 for stereo)
   int16_t sampleBuffer[0x400 * 2];