feat: Update styles and add new footer background color

- 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.

static/css/style.css

@@ -2778,6 +2778,11 @@ body {
   border-color: rgb(209 213 219 / var(--tw-border-opacity, 1));
 }
 
+.border-gray-600 {
+  --tw-border-opacity: 1;
+  border-color: rgb(75 85 99 / var(--tw-border-opacity, 1));
+}
+
 .border-gray-700 {
   --tw-border-opacity: 1;
   border-color: rgb(55 65 81 / var(--tw-border-opacity, 1));