feat: add list command with global filters

internal/listing/summary.go

@@ -0,0 +1,20 @@
+package listing
+
+import "strings"
+
+// EmptyResultMessage returns a contextual message when no entries match.
+func EmptyResultMessage(req *ListingRequest) string {
+	if req == nil {
+		return "No entries matched the provided filters."
+	}
+
+	if len(req.Extensions) > 0 {
+		return "No entries matched extensions: " + strings.Join(req.Extensions, ", ")
+	}
+
+	if req.IncludeHidden {
+		return "No entries matched the provided filters (including hidden files)."
+	}
+
+	return "No entries matched the provided filters."
+}