feat:find and watch location, use shadcn sonner toast for errors.

- added tailwindcss with shadcn-svelte sonner toasts
- added a location store and a geolation util to find, watch, use and
store locations and their updates
- added a LocationButton to navigate to the current location and handle
errors.
- updated the Map to use LocationButton and go to current location.

src/routes/+layout.svelte

@@ -3,9 +3,9 @@
 	import favicon from '$lib/assets/favicon.svg';
 	import { Header } from '$lib';
 	import { page } from '$app/state';
+	import { Toaster } from '$lib/components/sonner/index.js';
 
 	let { children, data } = $props();
-
 	let isLoginRoute = $derived(page.url.pathname.startsWith('/login'));
 	let showHeader = $derived(!isLoginRoute && data?.user);
 </script>
@@ -14,6 +14,8 @@
 	<link rel="icon" href={favicon} />
 </svelte:head>
 
+<Toaster />
+
 {#if showHeader && data.user}
 	<Header user={data.user} />
 {/if}