cad/openvsp: Update to 3.48.0
ChangeLog:
https://openvsp.org/blogs/announcements/2026/02/28/openvsp-3-48-0-released
Features:
- Buttons to turn off skinning for Stacks
- Shape presets for Stacks — makes engine flowpaths easy
- Negative only engine representations
- Extend flowpath in global X direction
Fixes:
- Fix twist / dihedral interaction, add options for XZ only twist
- Fix correct thickness for dihedral
- Pick now works with hidden, shaded, and texture views
- FEA GUI Bug with laminates
- FEA Part dissappearing bug
- VSPAERO Viewer font fail to load
- VSPAERO console font on Windows Japanese locale unreadable
- Ubuntu Python NumPy version mixup