Add CODEOWNER file for process_description

Author: aschemmel-tech

.github/CODEOWNERS

@@ -0,0 +1,9 @@
+# GitHub CODEOWNERS file is a simple way to automate review system on github,
+# by automatically assigning owners to a pull request based on which files
+# were modified. All directories should have a proper codeowner
+# Syntax: https://help.github.com/articles/about-codeowners/
+
+# default owners
+# @eclipse-score/community-process
+# interim solution:
+* @ltekieli @pahmann @antonkri @PhilipPartsch @masc2023 @FScholPer @qor-lb @johannes-esr @markert-r @aschemmel-tech