fix(sdmmc): Multi-block read/writes support refactor + tests and documentation added

examples/storage/sd_card/sdmmc/main/sd_card_example_main.c

@@ -162,6 +162,7 @@ void app_main(void)
     // For setting a specific frequency, use host.max_freq_khz (range 400kHz - 40MHz for SDMMC)
     // Example: for fixed frequency of 10MHz, use host.max_freq_khz = 10000;
     sdmmc_host_t host = SDMMC_HOST_DEFAULT();
+    host.unaligned_multi_block_rw_max_chunk_size = 8;
 #if CONFIG_EXAMPLE_SDMMC_SPEED_HS
     host.max_freq_khz = SDMMC_FREQ_HIGHSPEED;
 #elif CONFIG_EXAMPLE_SDMMC_SPEED_UHS_I_SDR50

examples/storage/sd_card/sdspi/main/sd_card_example_main.c

@@ -122,6 +122,7 @@ void app_main(void)
     // For setting a specific frequency, use host.max_freq_khz (range 400kHz - 20MHz for SDSPI)
     // Example: for fixed frequency of 10MHz, use host.max_freq_khz = 10000;
     sdmmc_host_t host = SDSPI_HOST_DEFAULT();
+    host.unaligned_multi_block_rw_max_chunk_size = 8;
 
     // For SoCs where the SD power can be supplied both via an internal or external (e.g. on-board LDO) power supply.
     // When using specific IO pins (which can be used for ultra high-speed SDMMC) to connect to the SD card