feat: ai-proxy plugin #668

Job	Run time
build (ubuntu-20.04, linux_openresty, lua-resty-worker-events, t/http3/admin)	15m 41s
build (ubuntu-20.04, linux_openresty, lua-resty-worker-events, t/plugin/[a-k]*)	35m 5s
build (ubuntu-20.04, linux_openresty, lua-resty-worker-events, t/plugin/[l-z]*)	35m 16s
build (ubuntu-20.04, linux_openresty, lua-resty-worker-events, t/admin t/cli t/config-center-yaml...	25m 44s
build (ubuntu-20.04, linux_openresty, lua-resty-worker-events, t/node t/pubsub t/router t/script ...	24m 44s
build (ubuntu-20.04, linux_openresty, lua-resty-events, t/http3/admin)	15m 5s
build (ubuntu-20.04, linux_openresty, lua-resty-events, t/plugin/[a-k]*)	36m 47s
build (ubuntu-20.04, linux_openresty, lua-resty-events, t/plugin/[l-z]*)	35m 2s
build (ubuntu-20.04, linux_openresty, lua-resty-events, t/admin t/cli t/config-center-yaml t/cont...	25m 30s
build (ubuntu-20.04, linux_openresty, lua-resty-events, t/node t/pubsub t/router t/script t/secre...	27m 1s
	4h 35m 55s

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