Improve Readme Porting and Add ESP32

Improve Documentation

• extra/Porting.md
• Readme.md

Add ESP32 support using details supplied by users dharmik768 and n6il

Add STM32 Architecture

Add support for STM32 from user Hiabuto-de
Tested on STM32Duino-Framework and Platform IO on STM32F103C8T6 and an IBM Model M

Correction to multimedia STOP key

Typo in Multimedia STOP key was 0x38 (three eight) changed to 0x3B (three letter B)

All files reference version as V1.05

Add SAMD1 architecture

Add SAMD1 architecture

Simplify examples

Other tidy ups and additional multi-platform support

Improve Library Manager support and conditionals for future platforms

Latest Arduino Library Manager support for depends and includes
Simplify examples
Change conditionals for future platform support
Fix after keyboardReset internal tracking variables

Reduce redundant Safety code

Remove redundant buffer safety checks in available() method

Improved keywords File

Minor merge but improved Keywords file