zones: adds ForEachZone iterator

Signed-off-by: Alejandro Mery <amery@jpi.io>

pkg/zones/zones.go

@@ -40,6 +40,13 @@ func (m *Zones) ForEachMachine(fn func(*Machine)) {
 	}
 }
 
+// ForEachZone calls a function for each Zone in the cluster
+func (m *Zones) ForEachZone(fn func(*Zone)) {
+	for _, p := range m.Zones {
+		fn(p)
+	}
+}
+
 // NewFS builds a [Zones] tree using the given directory
 func NewFS(dir fs.FS, domain string) (*Zones, error) {
 	z := &Zones{