[build] template

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: GitHub Community Support
+    url: https://github.com/orgs/community/discussions
+    about: Please ask and answer questions here.
+  - name: GitHub Security Bug Bounty
+    url: https://bounty.github.com/
+    about: Please report security vulnerabilities here.

.github/PULL_REQUEST_TEMPLATE.md

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+<!--
+*Thank you very much for contributing to ForSt.
+
+## Contribution Checklist
+
+  - 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.
+  
+  - Make sure that the change passes the automated tests.
+
+  - Each pull request should address only one issue, not mix up code from multiple issues.
+-->
+
+## What is the purpose of the change
+
+*(For example: This pull request enables caching all the java classes that will be frequently used.)*
+
+
+## Brief change log
+
+*(for example:)*
+  - *A global cache container*
+  - *Cache entries for each objects*
+
+
+## Verifying this change
+
+*(Please pick either of the following options)*
+
+This change is a trivial rework / code cleanup without any test coverage.
+
+*(or)*
+
+This change is already covered by existing tests, such as *(please describe tests)*.
+
+*(or)*
+
+This change added tests and can be verified as follows:
+
+*(example:)*
+  - *first step*
+  - *second step*
+  - *third step, and xxx behaves as expected*