Provides a struct to hold usage data.
## Examples
iex> u = %UsageStat{path: "/", used_persent: "14"} ...> u.path "/"
t() :: %ExFacts.System.Disk.UsageStat{free: integer, fs_type: binary, inodes_free: integer, inodes_total: integer, inodes_used: integer, inodes_used_percent: float, path: binary, total: integer, used: integer, used_percent: float}