Support :transport :uds

We could support unix domain sockets. They can sometimes be twice as fast as network sockets.
This would help significantly with the tetris example:

```
bb -Sdeps '{:deps {io.github.borkdude/console-tetris {:git/sha "2d3bee34ea93c84608c7cc5994ae70480b2df54c"}}}' -m tetris.core
```

cc @lispyclouds @retrogradeorbit 