This addition will allow us to cross-compile swift-inspect to Windows
ARM64. Enabling the Windows ARM64 build permits the toolchain to become
more similar across the architectures.
Remove the reference to `DEVELOPER_DIR` and update the instructions to
actually be usable with a released snapshot (and official releases).
The development setup should mimic the actual layout further and is a
separate issue. This requires a new snapshot with
apple/swift-installer-scripts#128 included.
Hoist `iterateHeaps` into the `RemoteProcess` protocol, requiring an
implementation on all platforms. If the platform is unable to implement
heap traversal, it would be possible to simply leave the callback
uncalled.
Be more careful about memory queries, we may receive invalid memory
addresses.
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.
