feat(Progress): new component (#697)

Co-authored-by: Benjamin Canac <canacb1@gmail.com>

docs/components/content/examples/ProgressExampleAnimation.vue

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+<template>
+  <UProgress class="progress">
+    <template #indicator>
+      <div class="text-right text-amber-500">
+        🔥 This is too hot!
+      </div>
+    </template>
+  </UProgress>
+</template>
+
+<style scoped>
+.progress:deep(progress:indeterminate.animation-default) {
+  &:after {
+    @apply w-full text-red-500;
+    animation: my-glow-animation 3s ease-in-out infinite;
+  }
+
+  &::-webkit-progress-value {
+    @apply w-full text-red-500;
+    animation: my-glow-animation 3s ease-in-out infinite;
+  }
+
+  &::-moz-progress-bar {
+    @apply w-full text-red-500;
+    animation: my-glow-animation 3s ease-in-out infinite;
+  }
+}
+
+@keyframes my-glow-animation {
+  50% {
+    @apply text-amber-400;
+  }
+}
+</style>

docs/components/content/examples/ProgressExampleSlotIndicator.vue

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+<script setup>
+const temp = ref(35)
+
+const color = computed(() => {
+  switch (true) {
+  case temp.value < 10: return 'blue'
+  case temp.value < 20: return 'amber'
+  case temp.value < 30: return 'orange'
+  default: return 'red'
+  }
+})
+</script>
+
+<template>
+  <UProgress :value="temp" :max="40" :color="color">
+    <template #indicator="{ percent }">
+      <div class="text-right" :style="{ width: `${percent}%` }">
+        <span v-if="temp < 10" class="text-blue-500">Too cold!</span>
+        <span v-else-if="temp < 20" class="text-amber-500">Warm</span>
+        <span v-else-if="temp < 30" class="text-orange-500">Hot</span>
+        <span v-else class="text-red-500 font-bold">🔥 Too hot!</span>
+      </div>
+    </template>
+  </UProgress>
+</template>

docs/components/content/examples/ProgressExampleSlotStep.vue

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+<script setup>
+const task = ref(1)
+
+const steps = [
+  'Cloning...',
+  'Migrating...',
+  'Deploying...'
+]
+</script>
+
+<template>
+  <UProgress :value="task" :max="steps" indicator>
+    <template #step-0="{ step }">
+      <span class="text-lime-500">
+        <UIcon name="i-heroicons-arrow-down-circle" /> {{ step }}
+      </span>
+    </template>
+
+    <template #step-1="{ step }">
+      <span class="text-amber-500">
+        <UIcon name="i-heroicons-circle-stack" /> {{ step }}
+      </span>
+    </template>
+
+    <template #step-2="{ step }">
+      <span class="text-blue-500">
+        <UIcon name="i-heroicons-hand-thumb-up" /> {{ step }}
+      </span>
+    </template>
+  </UProgress>
+</template>