feat: add escaping functions in templates

phpcs.xml.dist

templates/button.php

templates/form-end.php

templates/form-field.php

templates/form-label.php

templates/form-start.php

templates/header.php

templates/input-checkbox.php

templates/input-date-picker.php

templates/input-hidden.php

templates/input-image.php

templates/input-number.php

templates/input-radio.php

templates/input-submit.php

templates/input-text-multiple.php

templates/input-text.php

templates/input.php

templates/paragraph.php

templates/product-select.php

templates/select.php