ReVanced global generic issue template

[validcube]

We need a generic global issue template because issue that pertains to repository like: https://github.com/ReVanced/revanced-documentation/issues?q=sort%3Aupdated-desc+is%3Aissue+is%3Aopen, apktool, discord bot, internal invoicing system... or repo that doesn't have issue template can't be open anymore.

(Note: Before it is possible to open blank issue for any repositories regardless of their configuration)

The template would look something like:

• Category: (Bug/Feature request)
• Description: (Describe your problem)
• System/App info: (OS, architecture, app version if applicable)