Add bug report template

[donpui]

We can add bug report template for this repo, to make it easier report and fill it.
We can use similar approach what we have in OpenProject for bugs.

Seems, this can be done, only who is admin/owner of repo

[btlogy]

Just like in #92 introduced from LeastAuthority/it-ops#32: we could use form like here.

[meejah]

Whatever we do here, can we maintain the option to file normal bugs without the template (at least for "contributors") please?

(Also, I've noted precisely zero PRs that actually use the "pull-request template" check-boxes -- is that actually useful?)

[btlogy]

Whatever we do here, can we maintain the option to file normal bugs without the template (at least for "contributors") please?

(Also, I've noted precisely zero PRs that actually use the "pull-request template" check-boxes -- is that actually useful?)

As discussed more broadly elsewhere:

• by default, contributors can still choose to use a blank issue or remove the content proposed by the template (pull request of issue).
• unfortunately, we don't seem to use those check-
• boxes when reviewing pull request indeed. Hopefully this issue will help us improving this (LeastAuthority/it-ops#142 )

[meejah]

I don't want to click a bunch of check-boxes though :/ so who is this template for exactly?