support ubuntu & mint (debian like) OS

[fermulator]

Description

add os_is() and os_is_like() call support for debian-like OSes ; specifically Mint but also ~Ubuntu; (Ubuntu should already be covered via "is like debian" but now we're extra covered)
Also if there is no OS match, we should really prompt the user for what to do.

fixes #2207

How to test

run dev_setup.sh on Linux Mint variant (positive test)
(I'm confident this didn't break debian/ubuntu, but in case we're worried test there too)

I tested the "continue?" clause for no OS match by adding (forging) a return in the os_is() and os_is_like() methods temporarily

Contributor license agreement signed?

• CLA

[devs-mycroft]

Hello, @fermulator, thank you for helping with the Mycroft project! We welcome everyone
into the community and greatly appreciate your help as we work to build an AI
for Everyone.

To protect yourself, the project, and users of Mycroft technologies we require
a Contributor Licensing Agreement (CLA) before accepting any code
contribution. This agreement makes it crystal clear that along with your
code you are offering a license to use it within the confines of this project.
You retain ownership of the code, this is just a license.

Please visit https://mycroft.ai/cla to initiate this one-time signing. Thank
you!

[fermulator]

Hello, @fermulator, thank you for helping with the Mycroft project! We welcome everyone
into the community and greatly appreciate your help as we work to build an AI
for Everyone.

To protect yourself, the project, and users of Mycroft technologies we require
a Contributor Licensing Agreement (CLA) before accepting any code
contribution. This agreement makes it crystal clear that along with your
code you are offering a license to use it within the confines of this project.
You retain ownership of the code, this is just a license.

Please visit https://mycroft.ai/cla to initiate this one-time signing. Thank
you!

(in fact I signed this BEFORE submitting the PR, but maybe there is a delay?)

[forslund]

I think this looks really good, going to test it during the week and when your CLA signature drops in I'll merge this unless I find something (but it looks nice, simple and good)

[forslund]

A brief explanation to the CLA delay. There is a bit of manual intervention needed to verify the signature and extract github username. I'm not involved in the process so I can't really speed it up :/

[fermulator]

(CLA still pending? hmmm)

[forslund]

Hmm, I know the CLA-mail was sent out on Monday morning. I'll poke the person responsible and see if the document has arrived and the list just haven't been updated...

[forslund]

Apparently your signature did not arrive. You should have a new e-mail with signing instructions in your email now.

[fermulator]

(clicked through the CLA again)
EDIT: did the final process on Jul22, I did not realize there were steps beyond the "clicking" portion initially ... completed the "hellosign" now

[forslund]

Sorry for the delay, the CLA dropped but I'm on vacation so I'm a bit behind on communication. Merging this now.

Many thanks for the nice and clean contribution!