组合框
将文本输入与弹出列表结合，支持筛选后单选或多选。
lr-combobox
import '@aceshooting/lyra-ui/components/lr-combobox.js';可选依赖：lr-option
示例
import '@aceshooting/lyra-ui/components/lr-combobox.js';
import '@aceshooting/lyra-ui/components/lr-option.js';
<lr-combobox label="Fruit" placeholder="Pick one…" clearable style="max-width:18rem">
<lr-option value="a">Apple</lr-option>
<lr-option value="b" selected>Banana</lr-option>
<lr-option value="c">Cherry</lr-option>
<lr-option value="d">Date</lr-option>
</lr-combobox>