[ISSUE #425] Using templates to encourage useful issues and PRs

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: 🐛 Bug Report
+about: If something isn't working as expected.
+labels: 'bug'
+---
+
+## Bug Report
+
+### Describe the bug
+<!--
+A clear and concise description of what the bug is.
+-->
+
+### Environment
+
+- OS: [e.g. Ubuntu 21.04 LTS]
+- EventMesh version(s): [e.g. 1.2.0]
+- RocketMQ version(s): [e.g. 4.7.1]
+- ...
+
+### Steps to reproduce
+<!--
+Describe the steps to reproduce the bug here.
+-->
+
+### Expected behavior
+<!--
+A clear and concise description of what you expected to happen.
+-->
+
+### Debug logs
+<!--
+Add your debug logs here.
+-->
+
+<details>
+<summary>Click to expand</summary>
+
+```
+replace this line with your debug logs
+```
+</details>

.github/ISSUE_TEMPLATE/documentation_related.md

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+---
+name: ✏️ Documentation Related
+about: I find some issues related to the documentation.
+labels: 'doc'
+---
+
+## Documentation Related
+
+<!--
+Describe the issues here :D
+-->

.github/ISSUE_TEMPLATE/enhancement_request.md

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+---
+name: ✨ Enhancement Request
+about: I want to suggest an enhancement for this project (and may want to implement it 🙂)!
+labels: 'enhancement'
+---
+
+## Enhancement Request
+
+<!-- 
+First of all: Have you checked the docs https://github.com/apache/incubator-eventmesh/tree/develop/docs, 
+or GitHub issues whether someone else has already reported your issue? 
+-->
+
+### Is your enhancement request related to a problem? Please describe
+
+<!-- 
+A clear and concise description of what the enhancement is.
+-->
+
+### Describe the solution you'd like
+
+<!-- 
+A clear and concise description of what you want to happen. Add any considered drawbacks.
+-->
+
+### Describe alternatives you've considered
+
+<!-- 
+A clear and concise description of any alternative solutions or features you've considered.
+-->
+
+### Additional context
+
+<!-- 
+Add any other context or screenshots about the enhancement request here.
+-->

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: 🚀 Feature Request
+about: I want to suggest a feature for this project (and may want to implement it 🙂)!
+labels: 'feature'
+---
+
+## Feature Request
+
+<!-- 
+First of all: Have you checked the docs https://github.com/apache/incubator-eventmesh/tree/develop/docs, 
+or GitHub issues whether someone else has already reported your issue? 
+Maybe the feature already exists?
+-->
+
+### Is your feature request related to a problem? Please describe
+
+<!-- 
+A clear and concise description of what the problem is.
+-->
+
+### Describe the solution you'd like
+
+<!-- 
+A clear and concise description of what you want to happen. Add any considered drawbacks.
+-->
+
+### Describe alternatives you've considered
+
+<!-- 
+A clear and concise description of any alternative solutions or features you've considered.
+-->
+
+### Additional context
+
+<!-- 
+Add any other context or screenshots about the feature request here.
+-->

.github/ISSUE_TEMPLATE/question.md

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+---
+name: 🤔 Question
+about: I have a question that isn't answered in docs or discussions.
+labels: 'question'
+---
+
+## Question
+
+<!--
+Describe your question here :D
+-->

.github/PULL_REQUEST_TEMPLATE.md

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-#TBD
+<!--
+### Contribution Checklist
+
+  - Name the pull request in the form "[ISSUE #XXXX] Title of the pull request", 
+    where *XXXX* should be replaced by the actual issue number.
+    Skip *[ISSUE #XXXX]* if there is no associated github issue for this pull request.
+
+  - Fill out the template below to describe the changes contributed by the pull request. 
+    That will give reviewers the context they need to do the review.
+  
+  - Each pull request should address only one issue. 
+    Please do not mix up code from multiple issues.
+  
+  - Each commit in the pull request should have a meaningful commit message.
+
+  - Once all items of the checklist are addressed, remove the above text and this checklist, 
+    leaving only the filled out template below.
+
+(The sections below can be removed for hotfixes of typos)
+-->
+
+<!--
+(If this PR fixes a GitHub issue, please add `Fixes ISSUE#<XXX>`.)
+-->
+
+Fixes ISSUE#<XXXX>.
+
+### Motivation
+
+*Explain the content here.*
+*Explain why you want to make the changes and what problem you're trying to solve.*
+
+
+
+### Modifications
+
+*Describe the modifications you've done.*
+
+
+
+### Documentation
+
+- Does this pull request introduce a new feature? (yes / no)
+- If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)
+- If a feature is not applicable for documentation, explain why?
+- If a feature is not documented yet in this PR, please create a followup issue for adding the documentation