chore: add issue template for bug reports (#56)

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,36 @@
+---
+name: Bug report
+about: Create a report to help us provide you with appropriate assistance to your
+  case
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+- [ ] I've updated the flake input to the latest version
+- [ ] I've correctly set up my XDG portals
+
+## Describe the bug
+A clear and concise description of what the bug is.
+
+## To Reproduce
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '...'
+3. Scroll down to '...'
+4. See error
+
+## Expected behavior
+A clear and concise description of what you expected to happen.
+
+## Screenshots
+If applicable, add screenshots to help explain your problem.
+
+## System Information
+- **OS**: (e.g. NixOS, Ubuntu, etc)
+- **Zen Browser version**: (e.g. twilight, beta)
+- **Desktop environment / Compositor / WM**: (e.g. KDE, GNOME, Hyprland)
+
+## Additional context
+Add any other context about the problem here.