Add support for storage command and crawler output

Partially addresses issue #3 by adding a simple `magellan list devices` command to list storage devices. To close the issue, this PR still requires including storage device information in the `crawler`'s output.

Reviewed-on: towk/magellan-ng#5

pkg/collect.go

@@ -97,6 +97,7 @@ func CollectInventory(assets *[]RemoteAsset, params *CollectParams, store secret
 				var (
 					systems  []crawler.InventoryDetail
 					managers []crawler.Manager
+					storage  []crawler.Storage
 					config   = crawler.CrawlerConfig{
 						URI:             uri,
 						CredentialStore: params.SecretStore,
@@ -116,6 +117,11 @@ func CollectInventory(assets *[]RemoteAsset, params *CollectParams, store secret
 					log.Error().Err(err).Str("uri", uri).Msg("failed to crawl BMC for managers")
 				}
 
+				storage, err = crawler.CrawlBMCForStorage(config)
+				if err != nil {
+					log.Error().Err(err).Str("uri", uri).Msg("failed to crawl BMC for storage")
+				}
+
 				// we didn't find anything so do not proceed
 				if util.IsEmpty(systems) && util.IsEmpty(managers) {
 					continue
@@ -144,6 +150,7 @@ func CollectInventory(assets *[]RemoteAsset, params *CollectParams, store secret
 					"RediscoverOnUpdate": false,
 					"Systems":            systems,
 					"Managers":           managers,
+					"Storage":            storage,
 					"SchemaVersion":      1,
 				}