Doc: bug report issue template

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,34 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Environment (please complete the following information):**
+ - OS:
+   - [ ] Linux
+   - [ ] Windows
+   - [ ] Mac
+   - [ ] Others: 
+ - Theme:
+   - [ ] Light
+   - [ ] Dark
+   - [ ] Alpenglow(System: Light)
+   - [ ] Alpenglow(System: Dark)
+   - [ ] System Default
+     - GTK Theme Name(Only Linux User): ex) Adwaita, Adwaita-Dark, Breath, Breath-Dark
+
+**Additional context**
+Add any other context about the problem here.