Refactor: Update HAL to use std::unique_ptr and ROS2 naming conventions

[zaynabahmad]

Description

This PR refactors the HAL.hpp for the Vacuum Cleaner exercise to improve memory management and adhere to ROS 2 coding standards.

Changes:

• Memory Safety: Replaced raw pointers with std::unique_ptr<LaserData> in get_laser_data() to prevent memory leaks.
• Naming Conventions: Updated member variables and method parameters to follow snake_case_ (Google/ROS 2 Style Guide).
• Performance: Optimized callbacks by passing messages by const SharedPtr&.
• Code Hygiene: Removed using namespace std; to prevent namespace pollution.

Testing Performed

• Verified the build process within the Docker container.
• Tested functionality in the browser-based simulation.
• Confirmed that the robot correctly processes laser data and executes motion commands.

Visual Proof

video.webm

Issue

Issue #3692

[javizqh]

We just finished with our refactor of the vacuum cleaner exercise. Please if possible update this PR to match the new files in cpp_lib in RA and common_interfaces_cpp in RI