[tui] Clean up logging.

src/gui.rs

@@ -1,11 +1,12 @@
 use anyhow::Result;
 use cxx_qt_lib::QString;
+use log::trace;
 
 pub mod colors;
 pub mod filesystem;
 
 pub fn run(root_path: std::path::PathBuf) -> Result<()> {
-    println!("Starting the GUI editor at {:?}", root_path);
+    trace!(target:"gui::run()", "Starting the GUI editor at {root_path:?}");
 
     use cxx_qt_lib::{QGuiApplication, QQmlApplicationEngine, QUrl};