PEP specifying WASI support

[brettcannon]

PEP 618: WASI support

The executive summary is: Lock down WASI and WASI SDK version support at b1 for the life of a Python version and write it down in PEP 11 Changes to the WASI SDK version after b1 requires writing down why Changes to the WASI version require SC approval Updating the target triple for main in PEP 11 doesn’t require anything special. I’ve cleared this with the appropriate folks at the Bytecode Alliance and our current and future RMs are aware of it.

please direct any comments to the other thread.