build out cli and add size and gather functionality

main.go

@@ -27,6 +27,7 @@ func main() {
 
 	source.GatherInfo(baseDir, store)
 	oneDVDSize := int64(4600000000)
+	//oneBRSize := int64(25000000000) // size of a small Blu-ray disc
 	partitions, err := partitioner.CalculatePartitions(store, oneDVDSize)
 	if err != nil {
 		panic(fmt.Errorf("error calculating partitions: %w", err))