Setup: Reviewers - Add default reviewers of the repo (#3)

* Setup: Reviewers - Add default reviewers of the repo

**Description**
Add default reviewers of the repo

**Major Revision**
- Add default reviewers of the development
- Add default reviewers for the docs

.github/CODEOWNERS

+# These owners will be the default owners for everything in the repo,
+# unless a later match takes precedence.
+*       @microsoft/superbench-dev
+
+
+# The owners own any file in the `/docs` directory in the root of
+# your repository and any of its subdirectories.
+/docs/  @TobeyQin @cp5555