feat(fish): Add cbe alias to ros2 env

fish/environments/templates/ros2.fish

@@ -53,6 +53,7 @@ end
 
 # ROS2 aliases and functions
 alias cb="colcon build"
+alias cbe="colcon build && env deactivate && cd ."
 alias cbs="colcon build --symlink-install"
 alias cbt="colcon build --packages-select"
 alias ct="colcon test"
@@ -67,4 +68,4 @@ function __env_custom_deactivate
     functions -e cb cbs cbt ct ctr 2>/dev/null
 
     echo (set_color blue)"ROS2 environment cleanup completed"(set_color normal)
-end
+end