Make open button configurable #433

The list of actions in the open button should be configurable. There are a million custom IDE like looks (including custom corporate tools), so listing or knowing all of them is infeasable. Also, sometimes I have tools installed, I don't want in the list. This is one of the more frustrating things with codex app.

I suggest adding a way to customize this list in the settings. On Mac you should pickup the icon from the application by default.