feat(platform): integrate st7789 boot test display and board gpio mapping

components/platform/include/platform.h

@@ -37,6 +37,11 @@ bool ble_printer_client_is_connected(void);
 void ble_printer_client_get_link_state(ble_link_state_t *out_state);
 esp_err_t ble_printer_client_write(const uint8_t *data, size_t len);
 
+// ---------- display_st7789 ----------
+esp_err_t platform_display_init(void);
+esp_err_t platform_display_show_test_pattern(void);
+void platform_display_deinit(void);
+
 // ---------- voice_audio ----------
 typedef struct {
     uint32_t sample_rate;