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.

assets/scss/custom.scss

@@ -93,6 +93,9 @@ body{
 header.header {
     background-color: $bg-dark-blue;
 }
+footer.footer {
+    background-color: $chill-green;
+}
 
 .chill-pres {
   padding-top: 0rem;
@@ -332,16 +335,7 @@ section.dark {
 
 
 ///// PAGES
-section {
-    &.page-hero {
-      height: 40vh;
-        background-color: $bg-dark-blue;
-        @include add-bg-pattern(1);
-        h1 { color: $text-green; }
-      i {
-        color: $chill-lightgray;
-      }
-    }
+
     .content-subtitle {
       text-transform: uppercase;
       padding-left: 2rem;
@@ -358,7 +352,7 @@ section {
     .bord-4 {
       border-left: 4px solid $chill-green;
     }
-}
+
 
 .chapo {
     font-size: large;