docs: update docs

Change-Id: I76d0f72679cd75085f5ffd42f641daa198cafe11

docs: update docs for alert/autocomplete/carousel, etc.

Change-Id: Ib7507f4979024f53c127e4b64b88560b93999db7

fix: update for autocomplete filter

Change-Id: Ie54556715fa52838aeb6caaa19b4f9a9f14b490f

docs: add docs for calendar/transfer/cascader

Change-Id: I655b3cb3d25dd0649de9ae7e224e7063a40dd079

fix: add more demos for input/textarea

Change-Id: Iada527ca82643a435a4775110b332155512d62a7

docs: add docs for uploader,select,table, etc.

Change-Id: Ib034fd5cc9d9a420d4e002956ae925175783c5f3

docs: adjust formatting and punc.

docs: adjust docs for uploader, etc.

Change-Id: If06c8c1102eafce43f5802a333676fc9e62cd474

docs: add docs for nav

Change-Id: If56a653ec53f19239606128fd30cae80f8e10025

docs: improve anchor demos

Change-Id: I6ac1c08cc8905924d0062def1f8921fe1f302f15

docs: refine wording and format

docs: update docs for check-button-group desc

Change-Id: Ica7d6d0692250f0be6bd330b1ad4cc41938afd46

one/docs/demo/checkbox-group/desc.vue

@@ -0,0 +1,50 @@
+<template>
+<article>
+  <section>
+    <veui-checkbox-group
+      v-model="flavor"
+      :items="flavors"
+    />
+  </section>
+  <section>
+    <veui-checkbox-group
+      v-model="flavor"
+      :items="flavors"
+    >
+      <template #desc="{ desc, label }">
+        {{ desc || `a description for ${label}` }}
+      </template>
+    </veui-checkbox-group>
+  </section>
+</article>
+</template>
+
+<script>
+import { CheckboxGroup } from 'veui'
+
+export default {
+  components: {
+    'veui-checkbox-group': CheckboxGroup
+  },
+  data () {
+    return {
+      flavor: null,
+      flavors: [
+        { value: 'LATTE', label: 'Latte', desc: 'a description for latte.' },
+        { value: 'MOCHA', label: 'Mocha', desc: 'a description for mocha.' },
+        { value: 'AMERICANO', label: 'Americano' }
+      ]
+    }
+  }
+}
+</script>
+
+<style lang="less" scoped>
+section {
+  margin-bottom: 20px;
+}
+
+h4 {
+  margin-top: 0;
+}
+</style>