* feat: implement child menu support in main navbar
- Added a new JavaScript file for handling dropdown functionality in the navbar.
- Implemented event listeners for toggling dropdowns, closing them on outside clicks, and dismissing with the Escape key.
- Updated navbar HTML to support dropdown items with children, enhancing the navigation experience.
- Adjusted core script imports to include the new dropdown functionality.
* chore: update menu identifiers and add missing translations for development versions
* chore: update hugo stats
* chore: update script name
* chore: update menu item names to include arrows for external links
