* Add intro and remove ToC [ROCm/rccl commit: 3495baa6b2]
3495baa6b2
[ROCm/rccl commit: 3776129011]
3776129011
[ROCm/rccl commit: aaf8613b76]
aaf8613b76
* doc organization * removing what is rccl file * Update index.rst [ROCm/rccl commit: 3301cdf59a]
3301cdf59a