More documents are needed in Github REPO

Currently, following documents are needed:
-    README.md
-    CONTRIBUTING.md
-    CODE_OF_CONDUCT.md
-    LICENSE
-    CODEOWNER
-    contributor list

Some templates are also missing:
-    ISSUE Template
-    PR Template

Some robots are needed:
-    Auto merge
-    Code lint
-    CLA check
-    CI testing
-    Unit testing code coverage
