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/alert/extra.vue

@@ -0,0 +1,33 @@
+<template>
+<article>
+  <veui-alert
+    type="success"
+    ui="strong"
+    message="恭喜你，你的请求已成功处理"
+    closable
+  >
+    <template slot="title">恭喜你</template>
+    <template slot="extra">
+      <veui-button ui="text">查看详情</veui-button>
+    </template>
+    恭喜你，你的请求已成功处理
+  </veui-alert>
+</article>
+</template>
+
+<script>
+import { Alert, Button } from 'veui'
+
+export default {
+  components: {
+    'veui-alert': Alert,
+    'veui-button': Button
+  }
+}
+</script>
+
+<style lang="less" scoped>
+.veui-alert {
+  margin-bottom: 20px;
+}
+</style>

one/docs/demo/alert/title.vue

@@ -0,0 +1,36 @@
+<template>
+<article>
+  <veui-alert
+    type="success"
+    title="消息标题"
+  >
+    Your profile has been updated.
+  </veui-alert>
+  <veui-alert
+    type="success"
+  >
+    Your profile has been updated.
+    <template slot="title">消息标题</template>
+  </veui-alert>
+</article>
+</template>
+
+<script>
+import { Alert } from 'veui'
+
+export default {
+  components: {
+    'veui-alert': Alert
+  }
+}
+</script>
+
+<style lang="less" scoped docs>
+.veui-alert {
+  margin-bottom: 20px;
+}
+</style>
+
+<docs>
+可将消息标题写在 `title` 插槽中，也可以通过 `title` 属性进行指定。
+</docs>