## Summary
- Add weapon stat modifier types and API layer
- Rewrite AX skill components to fetch modifiers from API instead of
local data
- Add befoulment select component for weapon editing
- Update weapon edit views to use new modifier system
- Remove old hardcoded ax skill definitions
This is the frontend counterpart to the API weapon stat modifiers
feature. AX skills and befoulments are now fetched from the API instead
of being hardcoded in the frontend.
## Test plan
- [ ] Edit a weapon with AX skills, verify dropdown shows correct
options
- [ ] Add/remove AX skills on a weapon, verify saves correctly
- [ ] Add befoulment to a weapon, verify UI and save work
- [ ] Verify existing weapons with AX skills display correctly
