Add issue template (#45)

Author: IlyaKhD

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,27 @@
+<!--
+  Note: if the issue is a general React question, please check React Docs first: https://reactjs.org/docs
+  If your question is about  DevExtreme widgets' APIs, use the DevExpress Support Center: https://www.devexpress.com/Support/Center
+-->
+
+### Issue Type
+<!-- Do you want to request a feature or report a bug? Check one option with "x" -->
+[ ] bug report
+[ ] feature request
+
+### Current Behavior
+
+### Expected Behavior
+
+### Steps to Reproduce
+<!-- If the current behavior is a bug, please provide the steps to reproduce -->
+
+### Demo
+<!--
+  If you provide a minimal demo of the problem\proposal, it helps us to solve it much faster.
+  Paste the link to your online code editor (like https://stackblitz.com) below:
+-->
+
+### Environment Details
+<!--
+Specify DevExtreme version, DevExtreme React Components version, React version and other environment details or notes you consider important.
+-->