chore(all): review error wrappings

- remove repetitive `cannot` and `failed` prefixes
- rename `unmarshaling` to `decoding`

internal/netlink/family.go

@@ -16,7 +16,7 @@ const (
 func (n *NetLink) IsWireguardSupported() (ok bool, err error) {
 	families, err := netlink.GenlFamilyList()
 	if err != nil {
-		return false, fmt.Errorf("cannot list gen 1 families: %w", err)
+		return false, fmt.Errorf("listing gen 1 families: %w", err)
 	}
 	for _, family := range families {
 		if family.Name == "wireguard" {