Task: Add Github issue form templates

[Thaodan]

Github supports forms for issues to allow for better and easier bug reporting. I create bug and feature form templates for Communi-Sailfish, they could be reused here.

This requires:

• [ ] PR for templates
• [ ] Labels for newly created issues in triage
• [ ] Labels for feature requests that are unaccepted (so not made into a planed feature/story].
• [x] Label for Bugs
• [ ] Naming schema for github issue (see communi-sailfish for example)

See here: https://github.com/communi/communi-sailfish/issues/153