Optimize and refactor tilt counting

- Optimized tilt counting data by reducing the tilt counter variables into one for smaller memory footprint. So the `relay_chn_tilt_counter_t` type is replaced by a single `uint16_t` variable in the `relay_chn_tilt_ctl_t` structure. Hence the `relay_chn_tilt_counter_t` type has been removed since it is not necessary anymore.
- Refactored tilt count handling in NVS: consolidate forward and reverse counts into a single tilt count parameter.
- Updated NVS test files that affected by the data type and function signature changes.

Fixes #1079

private_include/relay_chn_nvs.h

@@ -68,21 +68,19 @@ esp_err_t relay_chn_nvs_get_tilt_sensitivity(uint8_t ch, uint8_t *sensitivity);
  * @brief Store tilt counters in NVS.
  *
  * @param[in] ch Channel number.
- * @param[in] forward_count Forward tilt counter value.
- * @param[in] reverse_count Reverse tilt counter value.
+ * @param[in] tilt_count Tilt count value.
  * @return ESP_OK on success, error code otherwise.
  */
-esp_err_t relay_chn_nvs_set_tilt_count(uint8_t ch, uint32_t forward_count, uint32_t reverse_count);
+esp_err_t relay_chn_nvs_set_tilt_count(uint8_t ch, uint16_t tilt_count);
 
 /**
  * @brief Retrieve tilt counters from NVS.
  *
  * @param[in] ch Channel number.
- * @param[out] forward_count Pointer to store forward tilt counter.
- * @param[out] reverse_count Pointer to store reverse tilt counter.
+ * @param[out] tilt_count Pointer to store tilt count.
  * @return ESP_OK on success, error code otherwise.
  */
-esp_err_t relay_chn_nvs_get_tilt_count(uint8_t ch, uint32_t *forward_count, uint32_t *reverse_count);
+esp_err_t relay_chn_nvs_get_tilt_count(uint8_t ch, uint16_t *tilt_count);
 #endif // RELAY_CHN_ENABLE_TILTING
 
 /**