Added checklists to issue templates

Author: adamperkowski

.github/ISSUE_TEMPLATE/bug_report.md

@@ -24,3 +24,9 @@ If applicable, add screenshots to help explain your problem.
 
 ## Additional context
 Add any other context about the problem here.
+
+## Checklist
+- [ ] I checked for duplicate issues.
+- [ ] I checked already existing discussions.
+- [ ] This issue is not included in the roadmap.
+- [ ] This issue is present on both stable and development branches.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -4,17 +4,21 @@ about: Suggest an idea for this project
 title: ''
 labels: 'enhancement'
 assignees: ''
-
 ---
 
-**Is your feature request related to a problem? Please describe.**
+## Is your feature request related to a problem? Please describe.
 A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
 
-**Describe the solution you'd like**
+## Describe the solution you'd like
 A clear and concise description of what you want to happen.
 
-**Describe alternatives you've considered**
+## Describe alternatives you've considered
 A clear and concise description of any alternative solutions or features you've considered.
 
-**Additional context**
+## Additional context
 Add any other context or screenshots about the feature request here.
+
+## Checklist
+- [ ] I checked for duplicate issues.
+- [ ] I checked already existing discussions.
+- [ ] This feature is not included in the roadmap.