chore: update vite-plus to 0.1.19 and @types/node to 25.6.0 (#10)

## Summary
- Bump `vite-plus` (and `@voidzero-dev/vite-plus-core` /
`@voidzero-dev/vite-plus-test` overrides) from 0.1.18 to 0.1.19
- Bump `@types/node` from ^25.5.2 to ^25.6.0

## Test plan
- [x] `vp install`
- [x] `vp check`
- [x] `vp test`

Author: fengmk2