Create ISSUE_TEMPLATE.md

Author: JonathanMagnan

.github/ISSUE_TEMPLATE.md

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+### Description
+Describe what is not working as expected or the desired feature.
+
+### Exception
+If you are seeing an exception, include the full exceptions details (message and stack trace).
+
+```
+Exception message:
+Stack trace:
+```
+
+### Fiddle or Project
+Create a Fiddle that reproduce the issue: https://dotnetfiddle.net/zB4SGA
+
+Or provide a project/solution that we can run to reproduce the issue.
+- Make sure the project compile
+- Make sure to provide only what's required for the issue, not the whole project
+- Private code can be send here: [email protected]
+
+_Note: If you are not able to provide code that reproduce the issue, we will not be able either._
+
+### Further technical details
+- EF version:
+- EF Plus version:
+- Database Provider: