console command launches dumb terminal without keyboard navigability

[lihaoyi]

$ ./mill -i main.console
[694/1] main.console
Welcome to Scala 2.13.14 (OpenJDK 64-Bit Server VM, Java 17.0.6).
Type in expressions for evaluation. Or try :help.
Sep 09, 2024 2:03:30 PM org.jline.utils.Log logr
WARNING: Unable to create a system terminal, creating a dumb terminal (enable debug logging for more information)

scala>

You can enter and delete text, but cannot move the cursor left or right with arrows. This is a consequence of #3363 which made even -i mill run in a subprocess connected by pipes, rather than in the client process as it did before. Probably fixable by ensuring we configure the server and client processes/jline/terminal correctly