Add font size customization options

[douglasduarte]

Summary

• Add global font size scaling support to the shared PDF renderer.
• Add exact font size replacements through a font size map.
• Expose the configuration through DaCommon and apply it when auxiliary documents create their internal PDF instances.
• Document DANFE usage and add tests for PDF font sizing and DANFE rendering with customized font sizes.

Usage

$danfe = new Danfe($xml);
$danfe->setFontSizeScale(0.9, 4);
$danfe->setFontSizeMap([
    10 => 9,
    8 => 7,
    '5.7' => 5,
]);
$pdf = $danfe->render();

Tests

• vendor/bin/phpunit --filter 'PdfFontSizeTest|DanfeTest'
• php -l src/Common/DaCommon.php && php -l src/Legacy/Pdf.php && php -l src/NFe/Danfe.php && php -l src/NFe/Traits/TraitBlocoIX.php

Note: running composer test locally with PHP 8.4 currently fails in NFePHP\DA\Tests\NFSe\DanfseTest::testUsaIbscbsConsolidadoDaInfNfseQuandoInformado because the generated text contains Base de Cálculo Após Exclusões e Reduções R$ 985,00 while the test expects R$ 777,77. This failure is outside the font customization changes.

[douglasduarte]

Closing this proposal to redesign the API with explicit per-DANFE-element font settings.