Add CODEOWNERS (#17238)

* Add CODEOWNERS

* me

Author: Charles-Gagnon

.github/CODEOWNERS

@@ -0,0 +1,5 @@
+# Lines starting with '#' are comments.
+# Each line is a file pattern followed by one or more owners.
+# Syntax can be found here: https://docs.github.com/free-pro-team@latest/github/creating-cloning-and-archiving-repositories/about-code-owners#codeowners-syntax
+
+/src/azureFunction @lucyzhang929 @chlafreniere @MaddyDev @VasuBhog @Charles-Gagnon