feat(i18n): ajouter des traductions pour l'auto-hébergement et par utilisateur
feat(styles): ajouter de nouvelles classes de style pour les arrière-plans et les grilles
- Deleted unused favicon file.
- Updated Tailwind CSS configuration to redefine primary and secondary colors.
- Adjusted button styles in CSS to use new color definitions.
- Removed English translations and added French translations for various UI elements.
- Created new layouts for features and updated existing layouts to reflect new design.
- Modified header and CTA components to use updated color scheme.
- Cleaned up pricing table shortcode to align with new styles.
- Updated theme metadata to reflect new author and project details.
- Added a footer background color using $chill-green in custom.scss and custom.css.
- Removed unused page-hero section styles from custom.scss.
- Updated pricing page content to reflect new service offerings and pricing in French.
- Created new markdown files for contact and installation guides.
- Updated hugo.toml for menu links and logo path.
- Added new CSS classes for border colors in style.css.
