Add event stack size option to esp_hidh_config_t and increase default event stack size in esp_hid_host example (IDFGH-4568) #6385
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The default stack size value of 2048 given to the "esp_bt_hidh_events" and "esp_ble_hidh_events" tasks make them prone to stack overflows on rapid events. The new value of 4096 seems to mitigate this issue for human-speed mouse and keyboard inputs, however may be insufficient for other cases, e.g., HID scanners, emulated HID devices, etc. Adding the event stack size as an option to the existing config struct allows for flexibility.
Resolves #6380