feature(peridot-cli): add task logs command

[NeilHanlon]

feature(peridot-cli): add task logs command

peridot task logs will accept either a build ID or package name. In the latter case, the project will be queried for the latest build for the given package name. With the build task ID in hand, the task can be queried for its BUILD_ARCH subtasks, which contain the logs for the binary RPM builds.

Passing -C or --cwd with a directory will change into that directory before writing files. That directory must exist beforehand. Otherwise, $PWD is used.

By default, a separate file will be created for each $taskId-$subtaskId-$architecture tuple, which accounts for modular packages with multiple outputs.

Passing the -c or --combined flag will combine all the logs into a single file, named $taskId.log