[New Feature] (config) Add a new template content with markdown for PR. [skip ci]

Author: Chisanan232

.github/PULL_REQUEST_TEMPLATE/pull_request_template.md

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+#### Pre-Checking
+
+‼️Please must read this section and check by yourself.
+⚠️Do NOT modify this section if it doesn't have any necessary reason.
+
+Please verify the PR header should be satisfied below format: 
+    
+    [commit topic] (commit scope) <commit summary>
+
+* commit topic: The major topic of your modify. It could have multiple topics, e.g., [Breaking Change + Test].
+* commit scope: The scope in project of modify. It could have multiple scopes, e.g., (config + test).
+* commit summary: Summary of the commits. It should be clear that the target, the KEY POINT why you modify it or what you resolve, etc.
+
+Please refer to [GCR (Git Commit Rules) of SmoothCrawler-Cluster](../../.gitcommitrules) to get more detail about it.
+
+<hr>
+
+### _Target_
+
+* The target why you modify something.
+
+
+### _Modify Code Scope_
+
+* The more details of project scope which be modified, e.g., (refer to below 2 example items)
+* Which sub-packages or modules or objects or functions, etc., in **source code**.
+* Which sub-packages or modules or objects or functions, etc., in **test**.
+
+
+### _Effecting Scope_
+
+* What's the scope in project it would affect with your modify? The format could refer to previous one section.
+
+
+### _Description_
+
+* the summary of your modify ...