Keep .config/google-chrome/NativeMessagingHosts

`chrome-launch` can be really useful to develop web-extensions. However, if a web-extension use the Native Messaging API, it needs a file in a [Native messaging host location](https://developer.chrome.com/extensions/nativeMessaging#native-messaging-host-location). Would it be possible to pass such a file content as a parameter to chrome-launch so it gets copied in the new profile?

Start by locating the chrome-launch logic that creates a new profile and copies profile files. Review how the Native Messaging host location under .config/google-chrome/NativeMessagingHosts is handled, then verify that a supplied file content is copied into the new profile and remains usable by the web extension.

Written by the indexing model from the issue text.