add hci_non_flushable_packet_boundary_flag_supported

extending daemon with gatt functionality

moved le cmd status, refactored gatt client is ready

listed gatt commands

define daemon commands for gap le scan and le connect, define gap events

ble client: moved disconnect to hci

ble client: connect functionality moved to hci

ble client: removed unused struct

ble client: implemented emit hci advertisement

ble client: scanning functionality moved to hci

track Bluetooth Device Address Type in hci_connection_t struct

added hci_release_packet_buffer() and l2cap_release_packet_buffer()

rename hci_get_outgoing_acl_packet_buffer into hci_get_outgoing_packet_buffer

add asserts to check if buffer was reserved before calling send prepared

add flag to track if hci packet buffer is reserved

add gap_set_local_name and mark local_name as const

validate HCI_PACKET_BUFFER_SIZE if defined

add hci_disable_l2cap_timeout_check() for testing

added hci_connection_for_bd_addr

added hci_set_class_of_device

renamed btstack config.h to btstack-config.h to allow for better integration with other projects

replaced #pragma once with old style #include guards to allow use of older compilers

support dedicated bonding and provide example for it

track legacy and ssp pairing, new implementation for hci_authentication_active_for_handle based on that

rename HANDLE_PIN_CODE_REQUEST TO DENY_PIN_CODE_REQUEST