Embedded CPython builds sys.path from PYTHONHOME only. Unlike the python
CLI it does not prepend the working directory, and unlike Windows'
getpathp.c it does not add the executable's directory either, so on POSIX
"from scripts import ..." (the asset-side scripts package used by texture
and screen renderers) fails to import.
Insert "." at the front of sys.path after interpreter init, matching how
the engine resolves every other asset (relative to CWD). Idempotent and
harmless on Windows.
Squashes the last five commits: migrate to Python 3.14 (CMake, AppVeyor, Azure, README), vcpkg/setup-ci fixes, CMake adjustments, remove bundled ref/python 2.7, and related scripting/static file updates.
Co-authored-by: Cursor <cursoragent@cursor.com>
