Update to new issue template workflow

Add wiki link to top since people don't (or can't) read it.
Change discord.me invite link back to normal discord.gg.
Change game-compatibility link to readme since people don't (or can't) read it.
Add Discord server link in config.yml.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,32 @@
+---
+name: Bug report
+about: Template for bug reports.
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+<!--
+# THIS IS NOT A SUPPORT FORUM! For support, first read the wiki:
+# https://github.com/xenia-project/xenia/wiki
+#
+# If your question wasn't answered there or you need help, proceed here:
+# Xenia Discord (#help) - https://discord.gg/5g93S8H
+# /r/xenia (questions thread) - https://www.reddit.com/r/xenia/
+#
+# DO NOT CREATE ISSUES ABOUT SPECIFIC GAMES IN THIS REPOSITORY!
+# a game specific issue would be e.g. "Game X crashes after you hit a character a certain way"
+# A Xenia issue would be e.g. "Kernel export NtDoSomething does nothing"
+# For specific games, visit https://github.com/xenia-project/game-compatibility#game-compatibility
+#
+# Try to create a very concise title that's straight to the point
+-->
+
+[//]: # (Describe what's going wrong:)
+
+[//]: # (Describe what should happen:)
+
+[//]: # (If applicable, provide a callstack here - esp. for crashes)
+
+[//]: # (If applicable, upload a logfile and link it here)

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Xenia Discord server
+    url: https://discord.gg/5g93S8H
+    about: Tech support for Xenia belongs here.