gitlab: add default template

.gitlab/issue_templates/Default.md

@@ -0,0 +1,41 @@
+### Describe your issue
+
+<!-- a clear and concise summary of the bug. -->
+<!-- For any GStreamer usage question, please contact the community using the #gstreamer channel on IRC https://www.oftc.net/ or the mailing list on https://gstreamer.freedesktop.org/lists/ -->
+
+#### Expected Behavior
+
+<!-- What did you expect to happen -->
+
+#### Observed Behavior
+
+<!-- What actually happened -->
+
+#### Setup
+
+- **Operating System:**
+- **Device:** Computer / Tablet / Mobile / Virtual Machine <!-- Delete as appropriate !-->
+- **Flatpak:** Yes/No
+- **GstPipelineStudio version:**
+- **GStreamer Version:**
+
+### Steps to reproduce the bug
+
+<!-- please fill in exact steps which reproduce the bug on your system, for example: -->
+
+1. open terminal
+2. type `command`
+
+### How reproducible is the bug?
+
+<!-- The reproducibility of the bug is Always/Intermittent/Only once after doing a very specific set of steps-->
+
+### Screenshots if relevant
+
+### Solutions you have tried
+
+### Related non-duplicate issues
+
+### Additional Information
+
+<!-- Any other information such as logs. Make use of <details> for long output -->