Copy codicons file as part of the build (#289411)

* Copy codicons file as part of the build

Part of #283823

* Merge branch 'main' into alexr00/inadequate-skink

* Remove unneeded changes

* Add readme

* Merge branch 'main' into alexr00/inadequate-skink

* Error handling for copy

* Do copy for editor

* Merge branch 'main' into alexr00/inadequate-skink

* Bump codicon version