Move code into cli directory

cli/src/logger.rs

@@ -0,0 +1,29 @@
+use log::{LevelFilter, Log, Metadata, Record};
+
+struct Logger {
+    pub filter: Option<String>,
+}
+
+impl Log for Logger {
+    fn enabled(&self, _: &Metadata) -> bool {
+        true
+    }
+
+    fn log(&self, record: &Record) {
+        eprintln!(
+            "[{}] {}",
+            record
+                .module_path()
+                .unwrap_or_default()
+                .trim_start_matches("rust_tree_sitter_cli::"),
+            record.args()
+        );
+    }
+
+    fn flush(&self) {}
+}
+
+pub(crate) fn init() {
+    log::set_boxed_logger(Box::new(Logger { filter: None })).unwrap();
+    log::set_max_level(LevelFilter::Info);
+}