Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+## Description
+
+One paragraph to explain the issue
+
+## Version
+
+ROS distribution : 
+
+Branch and commit you are using : 
+
+## Steps to reproduce
+
+1. *step 1...*
+2. *step 2...*
+
+
+## Code example (if necessary)
+
+```
+    # paste code here #
+```
+
+## Expected behavior
+
+Describe the expected behavior (in regard to the bug described above).
+
+## Any other information
+
+Any other information you believe the maintainers need to know.

.github/ISSUE_TEMPLATE/feature-enhancement-request.md

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+---
+name: Feature/enhancement request
+about: Suggest an enhancement for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+## Summary
+
+A short description of the requested feature.
+
+## Use case
+
+Why is this feature needed?
+
+What are the use case covered by this feature?
+
+## Alternative
+
+Do you have an idea how on how best to implement this enhancement?
+
+If this feature is not implemented, do you have a workaround?
+
+## Possible issues
+
+Anything that could be affected by the new feature.
+
+## Additional context
+
+Any other information you would like us to know about the requested enhancement.