esp32: re-implement integrate_btstack in python as rsync is missing in prebuild esp-idf windows toolchain

esp32: add make rule to compile gatt db instead of providing update_gatt.py

esp32: mention ./integrate_btstack and old make version

esp32: create examples in examples folder, fix update_gatt.sh

esp32: clone BTstack into esp-idf/components to allow out-of-tree app builds

esp32: update sdkconfig

esp32: enable Host Controller to Host Flow Control and update Readme

esp32: update tempalte sdkconfig

sm: ENABLE_MICRO_ECC_FOR_LE_SECURE_CONNECTIONS enables micro-ecc software implementation

esp32: create update_gatt.py instead of update_gatt.sh - also works on windows

esp32: update default sdkconfig

esp32: fix warning in btstack_tlv_esp32_store_tag

btstack_tlv: return 0 on ok for store_tag

esp32: add set_port.sh tool (unix only) to set serial port for esp tool

esp32: store LE bonding information using le_device_db_tlv

esp32: add to Chipset list, mention DLE support and multiple LE roles

esp32: enable support for LE Data Length Extension

esp32: remove debug output for btstack_stdin

esp32: add btstack_stdin support

esp32: fix a2dp_audio_source build

esp32: fix compile for HFP/HSP demos

esp32: mention CONFIG_BLUEDROID_ENABLED, update esp-idf

esp32: use malloc for btstack stuctures

esp32: update sdkconfig with default values

esp32: implement btstack_tlv.h interface on top of esp-idf nvs storage