feat(Str): Data setter

src/string/my_str_strict.rs

@@ -40,4 +40,9 @@ impl Str {
     pub fn get_size(&self) -> usize {
         return self._size;
     }
+
+    pub fn set_data(&mut self, data: &Vec<char>) {
+        self._data = data.to_vec();
+        self._size = data.len();
+    }
 }