Fixes: espressif#6019

## 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 espressif#6010 

espressif#6010 (comment)
Thanks @igrr for the suggestion!

Related to:
espressif#6012
espressif#5994
espressif#5991

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

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.

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

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

Summary

Added USB documentation.

Closes: espressif#5784

…nto espressif-master