Refactor PVC models and update tests

- Updated the PVC models in the database and adjusted the tests accordingly to reflect the new model counts and codes.
- Removed deprecated models from the JSON data for PVC systems.
- Added new GLB models for "scorrevole_sf_3_ante" and "scorrevole_sf_4_ante".
- Enhanced the development scripts to streamline the build process for both frontends.
- Updated documentation to reflect changes in the development environment and deployment process.
- Improved the styling of texture radio options for better visibility.
- Fixed URL handling in the configurator to ensure proper routing and API calls.

.env

@@ -1,2 +1,3 @@
-# Ambiente di sviluppo locale (pnpm dev). Usato solo dal browser (nessun segreto).
-VITE_PREVENTIVI_API_BASE=http://localhost:8000/api
+# Il configuratore è servito dal backend Laravel (/configuratore/) e usa l'API sulla stessa origine:
+# non serve configurare nulla. Solo per puntare a un'API su un altro dominio:
+# VITE_PREVENTIVI_API_BASE=https://altro-dominio.example/api