Add explicit angles dependency

[Plumezz]

This PR adds angles as an explicit dependency of vector_pursuit_controller.

src/vector_pursuit_controller.cpp directly includes angles/angles.h and uses APIs including angles::normalize_angle and angles::normalize_angle_positive in the controller implementation.

Currently, angles appears to be available transitively through Navigation2 dependencies such as nav2_controller or nav2_costmap_2d. This change makes the package manifest and CMake configuration match the direct source usage.

Changes:

• Add <depend>angles</depend> to package.xml.
• Add find_package(angles REQUIRED) to CMakeLists.txt.
• Add angles to the target/export dependency list.