Add basic issue template.

.gitlab/issue_templates/Bug.md

+## Required prerequisites
+
+- [ ] Make sure you've read the documentation. Your issue may be addressed there.
+- [ ] Search the issue tracker and discussions to verify that this hasn't already been reported. +1 or comment there if it has.
+
+## What commit version of aidge do you use
+- ``aidge_core``: X.X.X
+- ``aidge_...``: X.X.X
+
+## Problem description
+
+Define the expected behavior.
+
+Is this a regression ?
+
+Please provide logs in the form of a code block
+
+```bash
+Logs ...
+```
+
+## Reproducible example code
+
+You can attach code or use code block
+
+```python
+```
+
+or
+
+```c++
+```
+
+/label ~Issue::Bug 🐛