refactor(structure): move layered firmware modules from main to components

components/platform/include/voice_audio.h

@@ -0,0 +1,31 @@
+#pragma once
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "esp_err.h"
+
+typedef struct {
+    uint32_t sample_rate;
+    uint8_t channels;
+    uint8_t bits_per_sample;
+    int output_volume;
+    float input_gain_db;
+} voice_audio_open_config_t;
+
+esp_err_t voice_audio_open(const voice_audio_open_config_t *cfg, char *err, size_t err_len);
+void voice_audio_close(void);
+
+bool voice_audio_is_open(void);
+
+esp_err_t voice_audio_read_pcm(int16_t *pcm,
+                               size_t samples,
+                               uint32_t timeout_ms,
+                               char *err,
+                               size_t err_len);
+esp_err_t voice_audio_write_pcm(const int16_t *pcm,
+                                size_t samples,
+                                uint32_t timeout_ms,
+                                char *err,
+                                size_t err_len);