This PR converts the blob-store interfaces to wasi preview2 syntax and roughtly follows the wasi-http and wasi-keyvalue processes of conversion. It does
add a wit file for each interface
add a blob-store world file
add wasi-io and wasi-poll dependencies
removed write-stream, read-stream and replaced them with wasi-io streams.
This PR converts the blob-store interfaces to wasi preview2 syntax and roughtly follows the
wasi-http
andwasi-keyvalue
processes of conversion. It doesstream
syntax and usewasi-poll
for itFYI @stevelr