Rebrand from "Fuel Price" to "Fuel Alert" and update project metadata

- Rename project in package.json, composer.json, and .env.example
- Update app name, URLs, and session domains to fuel-alert
- Comment out testimonials section in Home.vue
- Revise footer copy: remove "

resources/js/components/landing/StatsRow.vue

@@ -22,7 +22,7 @@ const stats = computed(() => [
         value: props.stationCount ? props.stationCount.toLocaleString('en-GB') : '11,482',
         label: 'Stations tracked',
     },
-    { value: '£273', label: 'Median saving / yr' },
+    { value: '£8.40', label: 'Avg saving per tank*' },
     { value: '84%', label: 'Forecast accuracy' },
 ])
 </script>