[AC-1291] Add CODEOWNERS file (#349)

.github/CODEOWNERS

@@ -0,0 +1,12 @@
+# Please sort into logical groups with comment headers. Sort groups in order of specificity.
+# For example, default owners should always be the first group.
+# Sort lines alphabetically within these groups to avoid accidentally adding duplicates.
+#
+# https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+
+# Default file owners.
+* @bitwarden/team-admin-console-dev
+
+# DevOps for Actions and other workflow changes.
+.github/workflows @bitwarden/dept-devops
+.github/secrets @bitwarden/dept-devops