leap cli: move everything we can from leap_cli to leap_platform

lib/leap/platform.rb

lib/leap_cli/commands/deploy.rb

lib/leap_cli/config/environment.rb

lib/leap_cli/config/filter.rb

lib/leap_cli/config/manager.rb

lib/leap_cli/config/node.rb

lib/leap_cli/config/object.rb

lib/leap_cli/config/object_list.rb

lib/leap_cli/config/provider.rb

lib/leap_cli/config/secrets.rb

lib/leap_cli/config/sources.rb

lib/leap_cli/config/tag.rb

lib/leap_cli/leapfile_extensions.rb

lib/leap_cli/load_libraries.rb

lib/leap_cli/log_filter.rb

lib/leap_cli/macros.rb

lib/leap_cli/ssh/backend.rb

lib/leap_cli/ssh/remote_command.rb

lib/leap_cli/ssh/scripts.rb

lib/leap_cli/util/secret.rb