Update CODEOWNERS for `core` reintegration
This preserves the ownership relations that were in the `core` repo when it was added back to `habitat`.
components/backline @baumanj
components/builder-api-client @chefsalim @raskchanky
components/butterfly* @christophermaier @baumanj @raskchanky
+components/core @christophermaier @chefsalim @raskchanky @baumanj
components/common @baumanj @raskchanky
components/hab @christophermaier @chefsalim @baumanj @raskchanky @eeyun
+components/http-client @chefsalim @raskchanky
components/launcher* @christophermaier @baumanj @raskchanky
components/pkg-* @christophermaier @eeyun
components/plan-build @christophermaier @scotthain
components/studio @baumanj @eeyun
components/sup* @christophermaier @baumanj @raskchanky
-support @baumanj @raskchanky
+components/win-users @mwrock
+support @christophermaier @raskchanky @baumanj
tools @baumanj @chefsalim @christophermaier @eeyun @raskchanky
www @raskchanky
www/site/content/* @kagarmoe @mjingle
