audio: WASAPI exclusive resampling, buffer size increase options (#727)

## Link to GitHub Issue or related Pull Request, if one exists
n/a

## Description of change

Resampler:
Implement resampler for exclusive mode streams, as we are seeing more
and more devices - not just laptops but onboard audio devices - that
only support 48khz and not 44.1khz. Should work with volume boost (gain
calculated inside resample) and also downmixer (hands off intermediate
scratch buffers).

Buffer size increase:
By default many of these games request a tiny buffer when in shared mode
(TDJ uses 3ms). On some audio setup this results in crackling due to
underflow. Add an option to forcibly increase the buffer size.

## Testing
With resampler set to 48kHz and buffer set to 20ms I can reliably boot
and play IIDX on my display port monitor's speakers; previously this
wasn't possible. IIDX is event-driven.

Tested SDVX7 as well at 48kHz, which opens timer-driven streams.

src/spice2x/hooks/audio/audio.cpp

@@ -41,6 +41,8 @@ namespace hooks::audio {
     bool VOLUME_HOOK_ENABLED = true;
     std::optional<DownmixAlgorithm> DOWNMIX_ALGORITHM = std::nullopt;
     float VOLUME_BOOST = 1.0f;
+    std::optional<uint32_t> RESAMPLE_RATE = std::nullopt;
+    std::optional<uint32_t> EXCLUSIVE_BUFFER_MS = std::nullopt;
     bool USE_DUMMY = false;
     WAVEFORMATEXTENSIBLE FORMAT {};
     std::optional<Backend> BACKEND = std::nullopt;