Allow code to set the window title from the Terminal

I ask for the ability to specify the Window Title when opening a file or passing data from stdin to code, similar to how BBEdit provides for this using the `-t/--pipe-title` flags.

e.g. `bbedit -t `.

### Reason
My workflow often involves parsing data from log files and passing that data to a text editor for processing; however, I currently set the window title to match the command used to create that data as a way to differentiate different queries and results.