Merge #993

Merge #993

993: Fix installing vscode extension on MacOS r=matklad a=funkill

VSCode often installed in MacOS as `Visual Studio Code.app` package and `code` binary located at `Contents/Resources/app/bin` in package. This path not exists in `$PATH` variable and we can't run `code`.

In previous version of `do_run` function all before space was command and all after - arguments. If path or command has spaces, extracting command breaks. To fix this i extracted command to separated argument of function.

All packages can be placed in system app dir (`/Applications`) or user app dir (`~/Applications`). I created helper function for find app in this directories.

Co-authored-by: funkill2 <funkill2@gmail.com>