swift-inspect: add some documentation
swift-inspect: add some documentation

This adds some documentation about swift-inspect and how to build it on
Windows, which requires additional flags to locate the SwiftRemoteMirror
library from the toolchain.

roambotics/swift,atrick/swift,ahoppen/swift,roambotics/swift,roambotics/swift,gregomni/swift,ahoppen/swift,gregomni/swift,apple/swift,ahoppen/swift,glessard/swift,rudkx/swift,gregomni/swift,JGiola/swift,glessard/swift,rudkx/swift,apple/swift,rudkx/swift,rudkx/swift,benlangmuir/swift,gregomni/swift,ahoppen/swift,apple/swift,benlangmuir/swift,roambotics/swift,JGiola/swift,apple/swift,JGiola/swift,benlangmuir/swift,benlangmuir/swift,rudkx/swift,glessard/swift,JGiola/swift,benlangmuir/swift,ahoppen/swift,apple/swift,glessard/swift,roambotics/swift,gregomni/swift,glessard/swift,gregomni/swift,rudkx/swift,atrick/swift,atrick/swift,roambotics/swift,JGiola/swift,apple/swift,benlangmuir/swift,atrick/swift,atrick/swift,ahoppen/swift,atrick/swift,JGiola/swift,glessard/swift