fixes: #6152

* Add certificate bundle capability to WiFiClientSecure

Enable usage of the ESP32 IDF's certificate bundle for WiFiClientSecure connections.

Adds the ability to load a bundle or root certificates and use them for authenticating SSL servers.

Based on work from Onno-Dirkzwager, Duckle29, kubo6472, meltdown03, kinafu and others.

See also:
- https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/protocols/esp_crt_bundle.html
- https://github.com/espressif/arduino-esp32/issues/3646
- libraries/WiFiClientSecure/README.md

* Fix build issues

* Clean up old bundle index when NULL bundle is attached

* Add LionBit Dev Board.

* Create lionbit in variants.

esp-dsp: master 6b25cbb
esp-face: master 925c72e
esp-rainmaker: f1b82c7
esp32-camera: master 221d24d
esp_littlefs: master 5a13cd6

fixes: #5948

Cache downloaded tools.
Cancel duplicate jobs.
Use current repo when linking the core, this allows users to test their code when creating PRs against their forks (for instance an error in an example sketch will build successfully in a fork workflow.)
Cache Arduino IDE.
Add workflow_dispatch to be able to trigger the workflow manually.

Reliability fix for autoReconnect when assoc_fail, autoReconnect did not work before for these failures.

Changes behavior of WIFI_REASON_ASSOC_FAIL event when autoReconnect is set, removes WIFI_REASON_ASSOC_FAIL/WL_CONNECT_FAILED so retry waitforconnectresult loop stays active for the retry, was not working before.

* change parameter to signed int

As of wrong paramater, the following problem existed, that will be fixed now with this change.

BTScanResultsSet.cpp:67:8: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
if (i < 0)

* Change parameter and variable to int

As of wrong paramater, the following problem existed, that will be fixed now with this change.

BTScanResultsSet.cpp:67:8: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
if (i < 0)

I2C Slave currently doesn't compile for projects where Arduino is an IDF component.  This adds missing conditionals.
Co-authored-by: NMe No Dev <me-no-dev@users.noreply.github.com>

* Update of versions and Feature request template

* Update of versions and Feature request template

* Formatting

* Edit sd_diskio to check card status

* Bugfix of ff_sd_status

* Revert "Examples update, add a note for configTime() that only one ntp server is supported by lwip",
fixed in espressif/esp32-arduino-lib-builder#51

This reverts commit 6b1020967a171c549b3d956825fd0d395de9cce0.

* SimpleTime: add NTPoDHCP option and TimeZone env variable

* Adds UART RX IRQ Callback with onReceive()

Fixes #5737

Fixes #5873

Summary

This PR is refactoring of SigmaDelta HAL in order to use IDF instead of current Register manipulation approach.

Impact

Change in API:

uint32_t sigmaDeltaSetup(uint8_t channel, uint32_t freq);
changed to -->
uint32_t sigmaDeltaSetup(uint8_t pin, uint8_t channel, uint32_t freq);

void sigmaDeltaAttachPin(uint8_t pin); removed, no longer needed. Pin is attached in sigmaDeltaSetup()

SPI fix for QT Py, TFT fix for TFT Feather

Summary

RMT HAL refactoring based on IDF.

Impact

Improves RMT by adding IDF v4.4 support.
Receiving RMT can handle any size of data.
rmtInit() has a new parameter - RxBufferSize - to hold any number of data when receiving RMT.
rmtWrite() has a new parameter - wait_tx_done - to block writing until sending all data.

Related links

fix #5905

Summary

Added USB documentation.

Closes: #5784

This PR fixes an issue with UART when CPUFreq is lower than 80MHz (APB Freq)

This PR is refactoring of LEDC HAL in order to use IDF instead of current Register manipulation approach.
Fixing duty -> if all bits in resolution are set -> FULL ON

23 Braille Display Page (0x41)
Braille display allow visually impaired computer users to read out text using raised pins. The pins are electro-mechanically
activated. These devices also have support for controls that help navigate the computer screen. Typically, braille displays
interface with software known as a screen reader in order to perform this navigation.

fix not constant definitions in variant wt32-eth01 (error: initializer element is not constant)

Related to:
#6012
#5994
#5991

## Summary
Arduino ```setup()``` and ```loop()``` run under a Task with a fixed Stack size of 8KB.
Users may want to change this size.

This PR adds this possibility by just adding a line of code, as for example:
``` dart
ESP_LOOP_TASK_STACK_SIZE(16384);

void setup() { 
}

void loop() { 
}
```
## Impact
None. It adds a new functionality to ESP32 Arduino.
If ```ESP_LOOP_TASK_STACK_SIZE(newSize);``` is not declared/used, it will compile the sketch with the default stack size of 8KB.

## Related links
fix #6010 

https://github.com/espressif/arduino-esp32/issues/6010#issuecomment-992701658
Thanks @igrr for the suggestion!

Fixes: https://github.com/espressif/arduino-esp32/issues/6019

HardwareSerial flush() was returning before all data was sent out through serial port.
This is a problem to some RS485 libraries that depend on it to signaling.

This PR solves the issue by forcing it to block flush() until all data is sent.

This PR is refactoring of DAC HAL in order to use IDF instead of current Register manipulation approach.

Edited dacWrite() to use ESP-IDF api.
Added dacDisable() so there is an option to disable dac channel.
Co-authored-by: NMe No Dev <me-no-dev@users.noreply.github.com>

Fixes: https://github.com/espressif/arduino-esp32/issues/6020