Add more detailed issue templates

Shamelessly stolen from
https://github.com/HedgeDoc/client

Originally written by
https://github.com/ErikMichelson and
https://github.com/DerMolly

.gitlab/issue_templates/Feature Request.md

@@ -0,0 +1,28 @@
+<!--
+If you want to report a bug or an error,
+then please consider filling out a "Bug Report" instead!
+-->
+
+
+### 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
+
+<!-- A clear and concise description of what you want to happen. -->
+
+
+### Describe alternatives you've considered
+
+<!-- A clear and concise description of any alternative solutions or features you've considered. -->
+
+
+### Additional context
+
+<!-- Add any other context or screenshots about the feature request here. -->
+
+
+
+/label ~conduit