feat(Timeline): new component (#4215)

Co-authored-by: Benjamin Canac <canacb1@gmail.com>
Co-authored-by: Jakub <jakub.michalek@freelo.io>

playground/app/app.vue

@@ -61,6 +61,7 @@ const components = [
   'tabs',
   'table',
   'textarea',
+  'timeline',
   'toast',
   'tooltip',
   'tree'

playground/app/pages/components/timeline.vue

@@ -0,0 +1,60 @@
+<script lang="ts" setup>
+import type { TimelineItem } from '@nuxt/ui'
+import theme from '#build/ui/timeline'
+
+const sizes = Object.keys(theme.variants.size)
+const colors = Object.keys(theme.variants.color)
+const orientations = Object.keys(theme.variants.orientation)
+
+const orientation = ref('vertical' as const)
+const color = ref('primary' as const)
+const size = ref('md' as const)
+
+const items = [{
+  date: 'Mar 15, 2025',
+  title: 'Project Kickoff',
+  description: 'Kicked off the project with team alignment. Set up project milestones and allocated resources.',
+  icon: 'i-lucide-rocket',
+  value: 'kickoff'
+}, {
+  date: 'Mar 22, 2025',
+  title: 'Design Phase',
+  description: 'User research and design workshops. Created wireframes and prototypes for user testing',
+  icon: 'i-lucide-palette',
+  value: 'design'
+}, {
+  date: 'Mar 29, 2025',
+  title: 'Development Sprint',
+  description: 'Frontend and backend development. Implemented core features and integrated with APIs.',
+  icon: 'i-lucide-code',
+  value: 'development'
+}, {
+  date: 'Apr 5, 2025',
+  title: 'Testing & Deployment',
+  description: 'QA testing and performance optimization. Deployed the application to production.',
+  icon: 'i-lucide-check-circle',
+  value: 'deployment'
+}] satisfies TimelineItem[]
+
+const value = ref('kickoff')
+</script>
+
+<template>
+  <div class="flex flex-col gap-10">
+    <div class="flex items-center justify-center gap-2">
+      <USelect v-model="color" :items="colors" placeholder="Color" />
+      <USelect v-model="orientation" :items="orientations" placeholder="Orientation" />
+      <USelect v-model="size" :items="sizes" placeholder="Size" />
+      <USelect v-model="value" :items="items.map(item => item.value)" placeholder="Value" />
+    </div>
+
+    <UTimeline
+      v-model="value"
+      :color="color"
+      :orientation="orientation"
+      :size="size"
+      :items="items"
+      class="data-[orientation=horizontal]:w-full data-[orientation=vertical]:w-96"
+    />
+  </div>
+</template>