Archermmt

Intorduction @ https://discuss.tvm.apache.org/t/rfc-unity-msc-introduction-to-multi-system-compiler/15251

TODO: add tests for M0.2 after M0.3

Discussion on translate relay to relax without loss info: https://discuss.tvm.apache.org/t/msc-translate-relay-to-relax-without-loss-info/15650

@Lunderberg sorry for the late reply.... I've checked the failures, seems like tril/triu method have been changed, I'll fix them in latter PRs. And the reasons why build a duplicate...

@Lunderberg Emmm....I've also thought about this, which method is better: 1. Convert in C++ to enable eager errors detection; 2. Convert by string generation to enable independent loading. Both has...

Seem ok for me. The only change in this PR is the split direction, which has no influence on current test. I think the main reason is that: in some...