This allows arbitrary programs to have an easy mechanism to make
connections through Boundary using Go. Internal cluster tests and test
helpers have been migrated to use this package, as well as the `connect`
command.
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Co-authored-by: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
In preparation for putting proxy code in the api package this creates some necessary fields in the target output and it pre-moves credential parsing and proxy handshake code to their new places. This will make the diff for the actual proxy code move quite a bit smaller.
Co-authored-by: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>