Add support for Drone CI

[shywn-mrk]

Description

Added Drone CI support and configuration.

Checklist:

• I've added the option to choose Drone as the CI tool.
• I've updated the documentation.
• I've made sure that the config file is deleted when Drone is not selected.
• I've added the Drone config file.

Rationale

Fix #2082

[browniebroke]

Nice! Thanks for the contribution. Do you know of a convenient way for us, maintainers, to test this? No worries if not, though.

[shywn-mrk]

@browniebroke You're welcome! At this moment, unfortunately, no. But still trying to understand a way to somehow figure it out.

[browniebroke]

Are there any update on this? If not, I'm happy to accept it as community contributed as is. It's very much self-contained and easy to remove if we change our mind.

[shywn-mrk]

@browniebroke Right now I don't have any updates, but at that moment I checked for some static analyzing tools to ensure that the outputted syntax is correct but didn't find much. If I find anything I'll definitely inform you and support any changes. If it's possible for you to merge, I'll be happy. And actually, this if my first open-source contribution. :)

[browniebroke]

Ok, let's get it out, we might get some feedback from people using it, and it shouldn't impact those who don't.