### What this PR does / why we need it? Add vLLM Ascend project governance and first contributors docs ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? Preview Closes: https://github.com/vllm-project/vllm-ascend/issues/828 Closes: https://github.com/vllm-project/vllm-ascend/issues/929 Signed-off-by: Yikun Jiang <yikunkero@gmail.com>