Add documentation on how to write scripts

[sebastianludwig]

1. Be able to write scripts
   • LLDB command to print the project path (parse source info)
   • LLDB command to take a project relative path to a directory containing .lldb files. Create alias <file> command source <file>.lldb for every file in that directory.
2. Write documentation
   • Create a breakpoint anywhere in your code
     • Swift:
       • a symbolic breakpoint in @objc <module>.<AppDelegate>.init (@objc LLDO.AppDelegate.init)
     • ObjC
       • In your main function: Symbol main in your module (LLDO)
       • In any implemented AppDelegate method
   • execute debugger command create_actions <path>. Depending on where you set your breakpoint, path might need be be adjusted (give or take a ..)