Added support for M5Core2 in Graphics Primitives

[jsuutari]

Description

Added support for M5Core2 in Graphics Primitives Sample

Motivation and Context

• Helps users with M5Core2 to run Primitives sample with minimal changes

How Has This Been Tested?

Screenshots

Types of changes

• Improvement (non-breaking change that improves a sample)
• Bug fix (fixes an issue with a current sample)
• New Sample (adds a new sample)
• Config and build (change in the configuration and build system, 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]

Thanks for the proposition but this sample should work for all kind of MCU. So if you want to create a specific version for M5Stack, I'm fine. In that case, create another project, reuse all the cs file (by reference in the project, not by copy/paste), and adjust as well the README and category.txt so we're clear that it's a specific sample for M5Stack

[josesimoes]

@Ellerbach this seems to be stalled... do we want to merge it anyways and rework it later?

[Ellerbach]

do we want to merge it anyways and rework it later?

No merge for this one. Like we did for others, it's ok to create 2 projects so they work directly.