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.

hugo.toml

@@ -54,7 +54,7 @@ paginatePath = "page"
 [params]
   description = "Logiciel libre d'accompagnement social"
   author = "Champs-Libres"
-  logo = "/images/logo-darkmode.png"      # Path to your logo
+  logo = "/images/logo.png"      # Path to your logo
   customCSS = ["css/custom.css"]
 
 
@@ -108,12 +108,12 @@ paginatePath = "page"
     [menu.main.params]
       has_submenu = true
       submenu = [
-        { name = "Documentation technique", url = "/resources/technical_documentation" },
+        { name = "Documentation technique", url = "/resources/technical-documentation" },
         { name = "Manuels", url = "/resources/manuals" }
       ]
   [[menu.main]]
     name = "Nous contacter"
-    url = "/pricing"
-    weight = 3
+    url = "/contact"
+    weight = 5