GitHub workflow

[jposada202020]

Adding the Github workflow directory

[FoamyGuy]

I think we may want to see if it's possible to use the newer actions repo in build.yml instead of having everything directly in build here. This one is linked that way: https://github.com/adafruit/Adafruit_CircuitPython_Display_Text/blob/main/.github/workflows/build.yml

I'm not sure if there are any differences that will be needed due to circuitpython org instead of adafruit org, but ideally we want to re-use as much as we can.

having it in a seperate centralized location makes it easier to update the actions across all repos if/when the time comes.

[jposada202020]

@FoamyGuy Please take a look a #7 This solves the CI action, however it will fail, as the library needs some corrections to pass the test completely. So I propose the following:
We integrate the build.yml either manually or via PR even if the CI fails and then we could integrate PR #6 that will fix the library infrastructure problems. Let me know. Thanks :). Also I will close this one as #5 has the same intention and is cleaner. Thanks