This change enables picking the right board configuration from the
variants/ folder. Previously, we would always pick the default
configuration (e.g., "esp32" instead of "heltec_wifi_lora_32_V2").

* Adjustable Serial Event Task Stack Size And Priority

* Added options to Kconfig

* Added Core Affinity

* Added CONFIG_FREERTOS_UNICORE

* Removed _CONFIG from FREERTOS_UNICORE

* Fixing Core choice for OnReceive() 

Makes it alligned to changes in #6718
Also eliminates conflict with #6718 for merging
Co-authored-by: NRodrigo Garcia <rodrigo.garcia@espressif.com>
Co-authored-by: NMe No Dev <me-no-dev@users.noreply.github.com>

* Update Kconfig to autoselect the proper cunning core

* Always run UDP on Core0 by default

This is very much still work in progress and much more will change before the final 2.0.0

Some APIs have changed. New libraries have been added. LittleFS included.
Co-authored-by: NSeon Rozenblum <seonr@3sprockets.com>
Co-authored-by: NMe No Dev <me-no-dev@users.noreply.github.com>
Co-authored-by: Ngeeksville <kevinh@geeksville.com>
Co-authored-by: NMike Dunston <m_dunston@comcast.net>
Co-authored-by: NUnexpected Maker <seon@unexpectedmaker.com>
Co-authored-by: NSeon Rozenblum <seonr@3sprockets.com>
Co-authored-by: NmicroDev <70126934+microDev1@users.noreply.github.com>
Co-authored-by: Ntobozo <tobozo@users.noreply.github.com>
Co-authored-by: Nbobobo1618 <bobobo1618@users.noreply.github.com>
Co-authored-by: Nlorol <lorolouis@gmail.com>
Co-authored-by: Ngeeksville <kevinh@geeksville.com>
Co-authored-by: NLimor "Ladyada" Fried <limor@ladyada.net>
Co-authored-by: NSweety <switi.mhaiske@espressif.com>
Co-authored-by: NLoick MAHIEUX <loick111@gmail.com>
Co-authored-by: NLarry Bernstone <lbernstone@gmail.com>
Co-authored-by: NValerii Koval <valeros@users.noreply.github.com>
Co-authored-by: N快乐的我531 <2302004040@qq.com>
Co-authored-by: Nchegewara <imperiaonline4@gmail.com>
Co-authored-by: NClemens Kirchgatterer <clemens@1541.org>
Co-authored-by: NAron Rubin <aronrubin@gmail.com>
Co-authored-by: NPete Lewis <601236+lewispg228@users.noreply.github.com>

Follow up for https://github.com/espressif/arduino-esp32/pull/4564

ESP-IDF release/v3.3: 66d3783c8
esp-face: 420fc7e
esp32-camera: 0107093

Add sdkconfig option CONFIG_ARDUINO_UDP_TASK_PRIORITY, which sets the task priority for the UDP vtask." (#4131)

* Selective compilation

* Optimized component.mk

* Autoconnect WiFi now forces WiFi

with minimal SPIFFS partition size and OTA support for bigger apps

* Update BLE lib

* Update IDF to f586f5e

* Restructure Bluetooth Serial includes

* Update esptool and gen_esp32part

* Add partition scheme selection for menuconfig

* Add partition scheme selection for Arduino IDE

* Fix BLE example

* Second attempt BLE fix

* Add exceptions to PIO

Usable for library developers who write code not dependent on Arduino.
Adding 3 lines to the includes will permit their debug messages to be
visible in Arduino IDE or when enabled under IDF

Fixes: https://github.com/espressif/arduino-esp32/issues/343

it's part of esp-idf now and can be used by any project

IDF Options:
- Autostart Arduino (implements app_main)
- Disable HAL locks
- Set HAL debug level
- Auto-connect STA if configured (else will connect after WiFi.begin())