cluster: add Machine.ReadLines() shortcut

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

pkg/cluster/machine_file.go

@@ -53,6 +53,14 @@ func (m *Machine) ReadFile(name string, args ...any) ([]byte, error) {
 	return m.zone.zones.ReadFile(fullName)
 }
 
+// ReadLines reads a file from the machine's config directory,
+// split by lines, trimmed, and accepting `#` to comment lines out.
+func (m *Machine) ReadLines(name string, args ...any) ([]string, error) {
+	fullName := m.getFilename(name, args...)
+
+	return m.zone.zones.ReadLines(fullName)
+}
+
 // WriteStringFile writes the given content to a file on the machine's config directory
 func (m *Machine) WriteStringFile(value string, name string, args ...any) error {
 	fullName := m.getFilename(name, args...)