fix(clippy): replace Vec::new()+push with vec![] macro (clippy::vec_init_then_push)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: hyperpolymath

src/rust/src/robot.rs

@@ -51,8 +51,7 @@ pub struct Robot {
 impl Robot {
     /// Create a new robot
     pub fn new(position: Position) -> Self {
-        let mut path_history = Vec::new();
-        path_history.push(position);
+        let path_history = vec![position];
 
         Self {
             position,