Add issue template

Signed-off-by: Eric Zhao <sczyh16@gmail.com>

Author: sczyh30

.github/ISSUE_TEMPLATE/bug_report.md

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+<!-- Here is for bug reports ONLY! 
+
+If you're looking for help, please check our Dingtalk group and the Gitter room.
+
+Please try to use English to describe your issue, or at least provide a snippet of English translation.
+-->
+
+## Issue Description
+
+Type: *bug report*
+
+### Describe what happened
+
+
+### Describe what you expected to happen
+
+
+### How to reproduce it (as minimally and precisely as possible)
+
+1.
+2.
+3.
+
+### Tell us your environment
+
+
+### Anything else we need to know?

.github/ISSUE_TEMPLATE/feature_request.md

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+<!-- Here is for feature requests ONLY! 
+
+If you're looking for help, please check our mail list and the Gitter room.
+
+Please try to use English to describe your issue, or at least provide a snippet of English translation.
+-->
+
+## Issue Description
+
+Type: *feature request*
+
+### Describe what feature you want
+
+### Additional context
+
+Add any other context or screenshots about the feature request here.