[OCM Incubation] Find metrics of contributors

[xuezhaojun]

[haoqing0110]

We have a total of 294 contributors to the project since conception, and have a total of 106 contributors in the last year.

Over the last year, we have an average of 758 contributions and 30 contributors per month, an average of 85 PRs merged per month.

[haoqing0110]

/assign @haoqing0110