Automate the build of `CoverageKinematics` library

[vinay0000]

Currently the CoverageKinematics library is included as a submodule in the extern folder and it needs to be built separately. Also the python library path needs to be added every time (using source configure_env.sh) there is a new start of the environment.
The build and the installation of the CoverageKinematics library needs to be automated and included in the primary repository Makefile.

[vinay0000]

Instructions for syncing to the correct submodules before building also needs to be added

The following commands allow for a safe reset of the submodules to match the parent repo again:

git submodule foreach --recursive 'git reset --hard && git clean -fd'
git submodule update --recursive

[vinay0000]

Add documentation stating that the CoverageKinematic library uses a forked version of the GeometricTools library rather than the original upstream library.
Additionally, clarify whether the forked GeometricTools version includes any modifications to existing functionality or if it consists solely of additive changes relative to the original library.