Add issue templates

[tsalo]

References #110.

Changes proposed:

• Add bug report and feature request templates.
• Add link to NeuroStars for usage questions.

[zhao-cy]

TODO for myself:

• [ ] add to docs that users can also ask questions on neurostars edited on 10/27/2023: we don't recommend using neurostars for now.
• [x] bug report template:
  • [x] delete docker version
  • [x] add DataLad etc versions
  • [x] ask the users to report printed messages from babs-check-setup

[zhao-cy]

This resolves issue #147