Add code owners

CODEOWNERS

@@ -0,0 +1,15 @@
+# When a part of the project is modified that is owned by a code owner, 
+# the code owner has to be included in the respective PR's reviewer list.
+# The code owner has the right to delegate the responsibility to review.
+# https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+
+/node/ @sea212
+/runtime/ @sea212
+/zrml/authorized/ @Chralt98
+/zrml/court/ @Chralt98
+/zrml/global-disputes/ @Chralt98
+/zrml/prediction-markets/ @maltekliemann
+/zrml/rikiddo/ @sea212
+/zrml/simple-disputes/ @Chralt98
+/zrml/styx/ @yornaath
+/zrml/swaps/ @maltekliemann