Added board support package for Atom Lite

[Feiko]

Description

Added support for the M5StackAtomLite

• NeoPixel rgb light
• Button
• DAC
• SPI
• ADC
• I2C
• IR led

Motivation and Context

The next edition to the M5Stack familiy

How Has This Been Tested?

A test for the button and NeoPixel is included in the M5AtomLiteTestApp
IR, SPI, DAC, ADC are copied from other M5*Base projects. The pins have been changed to match the pins on the M5AtomLite in accordance to the M5 documentation. I did not have the means tot test this.

Used a M5AtomLite

Screenshots

Types of changes

• Improvement (non-breaking change that improves a feature, code or algorithm)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Config and build (change in the configuration and build system, has no impact on code or features)
• Dependencies (update dependencies and changes associated, has no impact on code or features)
• Unit Tests (work on Unit Tests, has no impact on code or features)
• Documentation (changes or updates in the documentation, has no impact on code or features)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[Ellerbach]

@Feiko as I adjusted some of the code already and the build, the projects, approving. Please adjust the small elements from the documentation. Once @josesimoes will have a quick look, we will be good to merge.

[Feiko]

Updated the readme

[josesimoes]

All up pretty good!! Great to have this new BSP! 👏🏻 😃

Two main issues:

1. the general naming as explained on the comment. I really think we should follow the official name. It's pretty much in context, so adding the M5 prefix can be confusing and will hinder search engine indexing/discover-ability.

2. missing version.json and reference to nbgv (just grab one for one of the other bindings and reset the version)

[josesimoes]

LGMT! All great. 💯 👏🏻