Permit book-fold printing

[potofcoffee]

Description

Microsoft Word permits printing documents folded as booklets or books. (See Create a booklet or book in Word).

Internally, this is accomplished by simply adding <w:bookFoldPrinting/> to settings.xml.

This patch adds this functionality to PHPWord.

Note: In order for this to properly work in Microsoft Word, both paperSize/orientation and page dimensions need to be set for the section. For example, to print a document on A4 paper (landscape) and fold it into A5 pages (portrait), use this section style:

$phpWord->getSettings()->setMirrorMargins(true);
$phpWord->addSection(array(
    'paperSize' => 'A4',
    'orientation' => 'landscape',
    'pageSizeW' => \PhpOffice\PhpWord\Shared\Converter::cmToTwip(14.85),
    'pageSizeH' => \PhpOffice\PhpWord\Shared\Converter::cmToTwip(21),
));

Checklist:

• I have run composer run-script check --timeout=0 and no errors were reported
• The new code is covered by unit tests (check build/coverage for coverage report)
• I have updated the documentation to describe the changes

[Progi1984]

Suggested change

	$this->bookFoldPrinting = $bookFoldPrinting;
	$this->bookFoldPrinting = $bookFoldPrinting;
	return $this;

[Progi1984]

@potofcoffee Thank you for your contribution. Could you rebase your PR, please ?

(It's a good job).

[Progi1984]

Some type hintings

[Progi1984]

@potofcoffee Thank for your contribution. Could you fix the CI ?

[Progi1984]

Superseeded by #2470.