Rename src/rendezvous_hohmann.{h,cpp} to src/rendezvous.{h,cpp} and
tests/test_rendezvous_hohmann.{cpp,toml} to tests/test_rendezvous.{cpp,toml}.
This consolidates the rendezvous module under a simpler name since the
old CW-based rendezvous module was removed and only Hohmann transfer
functionality remains.
Update all includes, config paths, and Makefile references.
Add validate_hohmann_transfer_parameters(), calculate_relative_orbit_period(),
and calculate_next_hohmann_wait_time() for robust Hohmann transfer setup.
Update required_separation() and calculate_wait_time_for_hohmann() to use
[-pi, pi] normalization instead of [0, 2pi).
cinnaboot