[feature] Add bazel support in 2.0 document

[npuichigo]

What is your suggestion?

In 1.0 there's doc of integration with bazel, but it's missing in 2.0

Have you read the CONTRIBUTING guide?

• I've read the CONTRIBUTING guide

[memsharded]

Thanks for the suggestion @npuichigo

The thing is that the Bazel integration is still a bit too early, and we cannot mature it because we lack the expertise in Bazel (and we don't have time). But, yes, lets try to document it in 2.0 as experimental so at least more people test it and give feedback.