pbap_client: implement pbap_lookup_by_number

pbap_client: add support for md5 authentication challenge

example: register for events after setting up the stack, register for hci events after sm_init()

example/pbap_client_demo: add pbap_get_phonebook_size

update examples docu

docu: add example tags, fix table for pdf

autoconnect if STDIN is not defined

remove Remove Ctrl-C from usage

btstack_stdin: provide console input in callback

btstack_stdin: replace stdin_support.[ch] with btstack_stdin.h and platform implementations

example/pbap_client_demo: fix include

tool: add update_filename.py that adds __BTSTACK_FILE__ to every .c file for use with debug output instead of __FILE__

pbap: add Phone Book Access Client (PBAP) over General Object Exchange (GOEP)

create RFCOMM connection
send OBEX Connect and receive response
retrieve phone book
repeat GET request when response inc

pbap: add Phone Book Access Client (PBAP) over General Object Exchange (GOEP)

create RFCOMM connection
send OBEX Connect and receive response
retrieve phone book
repeat GET request when response incomplete
start extracting goep_client.h
support CONNECT message
support GET message
add obex_iterator
use obex_iterator
goep_client adds connection_id if available
avoid accessing internal goep state from pbap
start extracting pbap_client.h
events: add meta events and data packet types for GOEP and PBAP
use events and data packet type for goep
use events and data packet type for pbap
remove private fields from GOEP_SUBEVENT_CONNECTION_OPENED
implement SetPhoneBook
return cid in connect operations, return errors if busy, return obex errors
limit OBEX packet size by bearer MTU
split into obex.h, goep_client.h, goep_client.c, pbap_client.h, pbab_client.c
fix state after pull phonebook
add console UI for testing
clean up code
provide packet_handler in create connection for pbap_client and goep_client
annotate headers for goep_client and pbap_client

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