Migrate the Code Suggestions "Quick Start" doc to "docs.gitlab.com"
Move the contents of this document https://docs.google.com/document/d/15mcc8LE0jcqORcrZJayoT-6r9HgCdJClBLkwZPHIYkY/edit to docs.gitlab.com.
Related to #412044 (closed) for context.
Move the contents of this document https://docs.google.com/document/d/15mcc8LE0jcqORcrZJayoT-6r9HgCdJClBLkwZPHIYkY/edit to docs.gitlab.com.
Related to #412044 (closed) for context.