Create auto_assign.yml

.github/auto_assign.yml

+# Set to true to add reviewers to pull requests
+addReviewers: true
+
+# Set to true to add assignees to pull requests
+addAssignees: true
+
+# A list of reviewers to be added to pull requests (GitHub user name)
+reviewers: 
+  - NGPixel
+
+# A list of keywords to be skipped the process that add reviewers if pull requests include it 
+skipKeywords:
+  - wip
+
+# A number of reviewers added to the pull request
+# Set 0 to add all the reviewers (default: 0)
+numberOfReviewers: 0