Add a support discussion template

Author: Kovah

.github/DISCUSSION_TEMPLATE/support.yml

@@ -0,0 +1,8 @@
+body:
+  - type: markdown
+    attributes:
+      value: |
+        ### Hi, thanks for using LinkAce!
+        Before starting to write this discussion, please follow the [**Troubleshooting Guide**](https://www.linkace.org/docs/v2/general/troubleshooting/) to find out more about your problem, as well as common issues encountered while running LinkAce.
+        ### Disclaimer
+        As written in the Readme of the project and on the website: I built LinkAce to solve my problem, and I now share my solution and code to your without charging anything. I spent a lot of my free time building this application already, so I won't offer any *free* personal support, customization or installation help.