Add issue templates and pull request templates for the repository

.github/ISSUE_TEMPLATE/book_errata.md

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+---
+name: Book issues
+about: "Submit errata for the for the book \"Excelize: The Definitive Guide\", 1st Edition, Simplified Chinese version"
+
+---
+
+<!--
+Have you discovered erroneous material? Please tell us about it so we can fix
+it in the next ebook release and printing.
+
+Use the commands below to provide key information.
+-->
+
+**Page number or section name where error is located**
+
+**Location on the page**
+
+<!--- e.g., 3rd paragraph -->
+
+**Type of error**
+
+<!--- What types of error? Put an `x` in all the boxes that apply: -->
+
+- [ ] Serious technical mistake
+- [ ] Minor technical mistake
+- [ ] Important language/formatting problem
+- [ ] Language change or typo
+- [ ] Question or request for clarification
+
+**Format of product where you found the error**
+
+<!--- What types of product? Put an `x` in all the boxes that apply: -->
+
+- [ ] Printed
+- [ ] ePub
+- [ ] PDF
+- [ ] Other Digital Version
+
+**Detailed description of error**
+
+<!-- Submit errata for the book "Excelize: The Definitive Guide", 1st Edition, Simplified Chinese version -->

.github/ISSUE_TEMPLATE/docs_issue.md

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+---
+name: Docs issues
+about: Create a report to help us improve
+
+---
+
+<!--
+If you are reporting a new issue, make sure that we do not have any duplicates
+already open. You can ensure this by searching the issue list for this
+repository. If there is a duplicate, please close your issue and add a comment
+to the existing issue instead.
+
+Use the commands below to provwide key information.
+-->
+
+**Description**
+
+<!--
+Briefly describe the problem you are having in a few paragraphs. Share your
+experience with us, but please don't include sensitive or personal information.
+-->
+
+**The reason for your feedback**
+
+<!--- What types of feedback? Put an `x` in all the boxes that apply: -->
+
+- [ ] Content is hard to understand
+- [ ] Procedure or code doesn't work
+- [ ] Couldn't find what I need
+- [ ] Out of date/obsolete
+- [ ] Other
+
+**Docs URL:**
+
+```text
+(paste here)
+```

PULL_REQUEST_TEMPLATE.md

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+# PR Details
+
+<!--- Provide a general summary of your changes in the Title above -->
+
+## Description
+
+<!--- Describe your changes in detail -->
+
+## Related Issue
+
+<!--- This project only accepts pull requests related to open issues -->
+<!--- If suggesting a new feature or change, please discuss it in an issue first -->
+<!--- If fixing a issue, there should be an issue describing it with steps to reproduce -->
+<!--- Please link to the issue here: -->
+
+## Motivation and Context
+
+<!--- Why is this change required? What problem does it solve? -->