@Override
    public String selectIdByName(final String name) {
        PluginDO pluginDO = pluginMapper.selectByName(name);
        Objects.requireNonNull(pluginDO);
        return pluginDO.getId();
    }
query all plugin.

@return {@linkplain List}
shenyu-admin/src/main/java/org/apache/shenyu/admin/service/impl/PluginServiceImpl.java