Add RunResources.get_n_steps method (#1225)

* Add RunResources.get_n_steps method

* Update CHANGELOG.md

* use no mut reference

Author: pefontana

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 #### Upcoming Changes
 
+* Add `RunResources::get_n_steps` method [#1225](https://github.com/lambdaclass/cairo-rs/pull/1225)
+
 * fix: pin Cairo compiler version [#1220](https://github.com/lambdaclass/cairo-rs/pull/1220)
 
 * perf: make `inner_rc_bound` a constant, improving performance of the range-check builtin

src/vm/runners/cairo_runner.rs

@@ -94,6 +94,10 @@ impl RunResources {
     pub fn consume_steps(&mut self) {
         self.n_steps -= 1;
     }
+
+    pub fn get_n_steps(&self) -> usize {
+        self.n_steps
+    }
 }
 
 #[derive(Debug)]
@@ -4978,7 +4982,7 @@ mod tests {
             Ok(())
         );
 
-        assert_eq!(run_resources, Some(RunResources::new(1)));
+        assert_eq!(run_resources.unwrap().get_n_steps(), 1);
     }
 
     #[test]