🐛 fix(bones): migrate:to-v3 reads a form tag with PHP inside it

[gfazioli]

Found by running the 3.0 report on the 14 boilerplates: the Options boilerplate writes <form action="#<?php echo $mid ?>" method="post">, and the > that closes the PHP ended the tag, so its five live POST forms were never listed, while the printed example beside them (rightly) was not either.

The tag is now matched over the whole file, PHP blocks inside it included, and kept when it starts in the markup (a view's HTML, a pages/ class's strings). New test: test_a_form_tag_with_php_inside_is_read. composer test: 350 tests and 897 assertions. On a copy of the Options boilerplate the report now lists view.php:137 and the five forms of resource.php (81–96), not the example at 56.

Trap met on the way: a PHP close tag inside a // comment ends the comment and PHP mode; the first version of the explaining comment quoted one, and every console test broke.