Support APISIX plugin - csrf

[WeixinX]

https://apisix.apache.org/docs/apisix/plugins/csrf/
In implementation, however, we need not replicate APISIX exactly, but instead should focus on the actual user needs behind the plugins, combined with the specific circumstances of Higress, to re-abstract configuration fields and corresponding capabilities. We can draw lessons from others, but we should not copy them exactly.

[dongjiang1989]

@WeixinX @johnlanni 此插件是否有人跟进？ 申请领任务