Introduce support for handling box architecture. Adds a new `box_architecture` setting that defaults to `:auto` which will perform automatic detection of the host system, but can be overridden with a custom value. Can also be set to `nil` which will result in it fetching the box flagged with the default architecture within the metadata. Box collection has been modified to allow existing boxes already downloaded and unpacked to still function as expected when architecture information is not available.
Vagrant Core Plugins
These are plugins that ship with Vagrant. Vagrant core uses its own plugin system to power a lot of the core pieces that ship with Vagrant. Each plugin will have its own README which explains its specific role.
Generate proto
grpc_tools_ruby_protoc -I . --ruby_out=gen/plugin --grpc_out=gen/plugin ./plugin_server.proto