fix(tui): allow for TUI use when hooked up to tty (#8942)

### Description

#8919 accidentally disabled TUI
usage when hooked up to a TTY

### Testing Instructions


Verify that you can now use the TUI if hooked up to TTY:


https://github.com/user-attachments/assets/1ae1d7db-4714-4abe-a1e6-13b4e564d006

Author: chris-olszewski

crates/turborepo-lib/src/config.rs

@@ -277,7 +277,8 @@ impl ConfigurationOptions {
     }
 
     pub fn ui(&self) -> UIMode {
-        if atty::is(atty::Stream::Stdout) {
+        // If we aren't hooked up to a TTY, then do not use TUI
+        if !atty::is(atty::Stream::Stdout) {
             return UIMode::Stream;
         }