Proxyless Bookinfo 示例

这个页面并不是Proxyless的例子。还是Proxy。另外行问问，Dubbo是否支持java agent的方式作为proxy。同时对Dubbo sdk进行瘦身。

Start with the Bookinfo page described in issue 2847 and compare its current content with the Proxyless behavior it claims to demonstrate. Confirm whether the example should be changed, then separately investigate the reported questions about Java-agent proxying and reducing the Dubbo SDK; the issue is complete only when its scope and expected documentation changes are clarified.

Written by the indexing model from the issue text.