fix: init plausible script (#1946)

Author: rtrompier

src/routes/+layout.svelte

@@ -286,4 +286,11 @@
 		<Toast message={currentError} />
 	{/if}
 	{@render children?.()}
+
+	{#if publicConfig.PUBLIC_PLAUSIBLE_SCRIPT_URL}
+		<script>
+			window.plausible=window.plausible||function(){(plausible.q=plausible.q||[]).push(arguments)},plausible.init=plausible.init||function(i){plausible.o=i||{}};
+			plausible.init()
+		</script>
+	{/if}
 </div>