chore: add issue template

.github/ISSUE_TEMPLATE/answer.md

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+---
+name: Answers
+about: Share answers/solutions to a question
+title: "#0 - "
+labels: answer
+---
+
+<!--
+
+Name your title starting with the question no you are trying to answer.
+
+For example:
+#12 - my one-line solution
+
+-->

.github/ISSUE_TEMPLATE/bug.md

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+---
+name: Bug
+about: I found some thing wrong!
+title: ""
+labels: bug
+---

.github/ISSUE_TEMPLATE/new.md

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+---
+name: New Question
+about: Adding a new question, it's already do-able.
+title: ""
+labels: new
+---
+
+<!--
+You need to privode a detailed description of your new question, 
+either in English or Chinese is acceptable (great if you can have both!).
+
+A minimal test cases are preferred.
+
+A detailed solution is not required, but be sure it's solvable.
+-->

.github/ISSUE_TEMPLATE/request.md

@@ -0,0 +1,6 @@
+---
+name: Question Request
+about: I have a demand to be solve, but I don't have solution yet.
+title: ""
+labels: request
+---