Update issue templates

added template to request users to:
- distinguish between ROS and ROS2 drivers
- use SpinView to test before filing bug reports

Author: berndpfrommer

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,16 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: "[BUG]"
+labels: bug
+assignees: ''
+
+---
+
+**Which driver is showing this bug, ROS1 or ROS2?**
+**Is this bug seen only with the ROS driver, but not with SpinView?**
+**Describe the bug and how to reproduce it**
+**System information**
+FLIR camera model:
+operating system:
+ROS/ROS2 distribution: