🚧 Migrate env variables to use internal SvelteKit system

Some API fetching function rewriting needed as privates cannot be included into public code

src/routes/+layout.svelte

@@ -9,6 +9,7 @@
     import { pageLoading, previousPage } from '$utils/stores'
     import { DURATION } from '$utils/contants'
     import '$utils/polyfills'
+    import { PUBLIC_ANALYTICS_KEY, PUBLIC_ANALYTICS_URL } from '$env/static/public'
     // Components
     import SVGSprite from '$components/SVGSprite.svelte'
     import SmoothScroll from '$components/SmoothScroll.svelte'
@@ -84,7 +85,7 @@
 
 {#if browser}
     <Analytics
-        appKey={import.meta.env.VITE_ANALYTICS_KEY}
-        url={import.meta.env.VITE_ANALYTICS_URL}
+        appKey={PUBLIC_ANALYTICS_KEY}
+        url={PUBLIC_ANALYTICS_URL}
     />
 {/if}