feat(*): Add basic example estimation page

src/routes/+page.svelte

@@ -5,4 +5,3 @@
 </script>
 
 <h1>Estimation Poker</h1>
-

src/routes/estimation/+page.svelte

@@ -0,0 +1,77 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import UsersList from '../../components/UsersList.svelte';
+	import EstimateGroupsList from '../../components/EstimateGroupsList.svelte';
+	import AverageEstimate from '../../components/AverageEstimate.svelte';
+
+	let estimates = [
+		{ name: 'User 1', estimate: 8 },
+		{ name: 'User 2', estimate: 8 },
+		{ name: 'User 3', estimate: 13 },
+		{ name: 'User 4', estimate: 13 },
+		{ name: 'User 5', estimate: 13 },
+		{ name: 'User 6', estimate: 21 },
+		{ name: 'User 7', estimate: 21 },
+		{ name: 'User 8', estimate: 21 },
+		{ name: 'User 9', estimate: 34 },
+		{ name: 'User 10', estimate: 34 },
+		{ name: 'User 11', estimate: 34 },
+		{ name: 'User 12', estimate: 34 },
+		{ name: 'User 13', estimate: 55 },
+		{ name: 'User 14', estimate: 55 },
+		{ name: 'User 15', estimate: 55 }
+	];
+
+	// Group users by their estimates
+	let estimateGroups: { [key: number]: string[] } = {};
+
+	function groupEstimates() {
+		estimateGroups = {};
+		estimates.forEach((estimate) => {
+			if (estimate.estimate !== null) {
+				if (estimateGroups[estimate.estimate]) {
+					estimateGroups[estimate.estimate].push(estimate.name);
+				} else {
+					estimateGroups[estimate.estimate] = [estimate.name];
+				}
+			}
+		});
+	}
+
+	function calculateAverageEstimate() {
+		let total = 0;
+		estimates.forEach((estimate) => {
+			if (estimate.estimate !== null) {
+				total += estimate.estimate;
+			}
+		});
+		return total / estimates.length;
+	}
+
+	let average = calculateAverageEstimate();
+
+	onMount(() => {
+		groupEstimates();
+	});
+
+	function handleEstimateChange(event: any, user: any) {
+		const { value } = event.target;
+		user.estimate = value !== '' ? Number(value) : null;
+		groupEstimates();
+		average = calculateAverageEstimate();
+	}
+</script>
+
+<h1>Estimation Page</h1>
+
+<UsersList {estimates} {handleEstimateChange} />
+
+{#if Object.keys(estimateGroups).length > 0}
+	<EstimateGroupsList {estimateGroups} />
+	<AverageEstimate {average} />
+{/if}
+
+<style>
+	/* CSS styles */
+	/* ... */
+</style>