Try workaround for macOS launcher issue (#58668)

This dodges [the
issue](JuliaLang/www.julialang.org#2291) on my
machine, let's see if it works for everyone.

Author: staticfloat

contrib/mac/app/startup.applescript

@@ -1,4 +1,4 @@
 set RootPath to (path to me)
 set JuliaPath to POSIX path of ((RootPath as text) & "Contents:Resources:julia:bin:julia")
 set JuliaFile to POSIX file JuliaPath
-tell application id "com.apple.finder" to open JuliaFile
+do shell script "open -a Terminal '" & JuliaFile & "'"