Copy PythonSkill.cpp and the EterBase/Poly formula parser verbatim, drop the
pending stand-in and the skill module stub, register initskill() after
initfly() and build CPythonSkill in m_pySkill's place. LoadLocaleData now
loads skilldesc/skilltable. Skill and item icon handles go through
Py_BuildPointer/PyTuple_GetPointer (ILP32 ints truncate 64-bit pointers).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
