feat: add doc bot to doc website

[hanxiao]

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[github-actions]

Latency summary

Current PR yields:

• 😶 index QPS at 1226, delta to last 2 avg.: +0%
• 😶 query QPS at 51, delta to last 2 avg.: -1%
• 😶 dam extend QPS at 52684, delta to last 2 avg.: +6%
• 😶 avg flow time within 1.0887 seconds, delta to last 2 avg.: -24%
• 😶 import jina within 0.3894 seconds, delta to last 2 avg.: -5%

Breakdown

Version	Index QPS	Query QPS	DAM Extend QPS	Avg Flow Time (s)	Import Time (s)
current	1226	51	52684	1.0887	0.3894
2.1.1	1199	48	45702	1.7065	0.3798
2.1.0	1251	54	52834	1.1767	0.446

Backed by latency-tracking. Further commits will update this comment.