ingredient/info: Add Fetcher concept

internal/wisski/ingredient/info/snapshots.go

@@ -0,0 +1,18 @@
+package info
+
+import "github.com/FAU-CDI/wisski-distillery/internal/wisski/ingredient"
+
+type SnapshotsFetcher struct {
+	ingredient.Base
+
+	Info *Info
+}
+
+func (lbr *SnapshotsFetcher) Fetch(flags ingredient.FetchFlags, info *ingredient.Information) (err error) {
+	if flags.Quick {
+		return
+	}
+
+	info.Snapshots, _ = lbr.Snapshots()
+	return
+}