use GitHub issue forms for opening issues

[nofishonfriday]

We could use GitHub issue forms for opening (more structered) issues here.

Live demo

About the actual content of the templates I'm open to discussion as this was stolen inspired from another repo anyway (thanks!). :)
E.g. I'm not sure if the

IF YOU DON'T FILL IN THE TEMPLATE PROPERLY, YOUR ISSUE IS LIABLE TO BE CLOSED.

paragraph is maybe a bit too strict...

edit:
Maybe the automatic bug labeling should also be removed and still done manually by the maintainers after reproduction?

[cfillion]

Wow, this is pretty cool!

Maybe the automatic bug labeling should also be removed and still done manually by the maintainers after reproduction?

Yeah, manual labeling is useful to sort the already confirmed bugs waiting to get fixed.

[nofishonfriday]

Wow, this is pretty cool!

Yeah, just discovered it by accident.

Yeah, manual labeling is useful to sort the already confirmed bugs waiting to get fixed.

Ok, will remove the auto bug labeling.

Any thoughts about the

IF YOU DON'T FILL IN THE TEMPLATE PROPERLY, YOUR ISSUE IS LIABLE TO BE CLOSED.

paragraph? I mean it would be a quite drastic change to the loose bug reporting policy we have currently. :D

edit: Maybe more effictive than discussing back and forth, if you want to merge it, feel free to edit it to your liking. :)

[nofishonfriday]

I've reworked and friendlyfied it a bit (Live demo is also updated, current state as the actual PR).
From my side it would be good to merge/use from now on I think. :)

[AppVeyorBot]

✅ Build sws 717-master completed (commit 1834b38753 by @nofishonfriday)

Windows 64-bit

• build/BuildUtils/SWS_Template.ReaperLangPack
• build/BuildUtils/whatsnew.html
• build/reaper_sws-x64.pdb
• build/sws-2.13.0.0-Windows-x64-github-issue-forms-1834b387.exe

Windows 32-bit

• build/BuildUtils/SWS_Template.ReaperLangPack
• build/BuildUtils/whatsnew.html
• build/reaper_sws-x86.pdb
• build/sws-2.13.0.0-Windows-x86-github-issue-forms-1834b387.exe

macOS x86 64-bit

• build/sws-2.13.0.0-Darwin-x86_64-github-issue-forms-1834b387.dmg

macOS x86 32-bit

• build/sws-2.13.0.0-Darwin-i386-github-issue-forms-1834b387.dmg

macOS ARM 64-bit

• build/sws-2.13.0.0-Darwin-arm64-github-issue-forms-1834b387.dmg

Linux x86 64-bit

• build/sws-2.13.0.0-Linux-x86_64-github-issue-forms-1834b387.tar.xz

Linux x86 32-bit

• build/sws-2.13.0.0-Linux-i686-github-issue-forms-1834b387.tar.xz

Linux ARM 64-bit

• build/sws-2.13.0.0-Linux-aarch64-github-issue-forms-1834b387.tar.xz

Linux ARM 32-bit

• build/sws-2.13.0.0-Linux-armv7l-github-issue-forms-1834b387.tar.xz