Added support for SAMD devices

[ilcato]

Fixes # or Enhancement #

Changes proposed in this pull request:

• Added support for SAMD based devices like MKR family. Tested on a MKR1000

Contributors: ilcato

[Blind228]

Just tested this fork from ilcato on a Arduino MKR WIFI 1010 and it works great. Fixes the "PluggableUSB.h not found" error I was having.

[takigama]

tested with seeed xiao and works on that as well.

[alphaleonis]

Rebased this onto the main branch and tested with an Adafruit Trinket M0. Seems to work great. :) (How come these PR:s never seem to get merged?) :(

[MHeironimus]

@alphaleonis asked:

How come these PR:s never seem to get merged?

Because I don't have time to test them. :)

Seriously though, I do appreciate people's contribution. Once a PR is created, people can use the PR version if they have that particular hardware. Once a PR is merged to master, there is an expectation that it is "supported". That means I need to test it well enough that I feel comfortable "supporting it", and that can take a lot of time.

[alphaleonis]

Because I don't have time to test them. :)

Ah, I understand. Supporting and testing for all different hardware out there of course would require a very large effort. Just having the PR here solved the problem for me anyway, so I'm happy. :)

[relaxibus]

tested with seeed xiao and works on that as well.

What Xiao module?