add issue template for bugs

.gitlab/issue_templates/Bug.md

@@ -0,0 +1,41 @@
+<!---
+Please read this!
+
+Before opening a new issue, make sure to search for keywords in the issues
+filtered by the "crash" or "bug" label:
+
+- https://gitlab.com/veloren/veloren/-/issues?label_name%5B%5D=type%3A%3Acrash
+- https://gitlab.com/veloren/veloren/-/issues?label_name%5B%5D=type%3A%3Abug
+
+and verify the issue you're about to submit isn't a duplicate.
+--->
+
+### Summary
+
+(Summarize the bug encountered concisely)
+
+### Steps to reproduce
+
+(How one can reproduce the issue - this is very important)
+
+### Relevant logs and/or screenshots
+
+<details>
+<summary>Logs and/or screenshots of the issue</summary>
+<pre>
+
+(Paste any relevant logs - please use code blocks (```) to format console output,
+logs, and code as it's tough to read otherwise.)
+
+</pre>
+</details>
+
+#### System details
+
+(Include important system details like OS and incase it's a graphical issue the gpu)
+
+#### Veloren version
+
+(What version the bug happened e.g. Nightly, Stable 0.X.0, master)
+
+/label ~ status::needs investigation ~type::bug