MathML Formula feature

[timconrad]

Describe the issue

This is tracked in MediaWikis phabricator.

• Make 'only MathML rendering' interface available on MediaWiki/MediaWiki as a setting (without SVG rendering
• https://phabricator.wikimedia.org/T327386 : Create a Full Coverage Test for TexVC(PHP)
• https://phabricator.wikimedia.org/T329620 : Fix Chem support, to be clarified: partly covered atm when test MMLGenerationTexUtilTest.php is active
• https://phabricator.wikimedia.org/T327388 : Generate and Update reference MathML (from Mathoid/LaTeXML) for the current tests
• https://phabricator.wikimedia.org/T327391 : Fix TexVC parsetree related issues
• https://phabricator.wikimedia.org/T327393 : Implement a comparison algorithm which can compare different MathML outputs for automated testing
• https://phabricator.wikimedia.org/T328752 Implement a comparison algorithm which can compare different MathML for scientific results (to be clarified)
• https://phabricator.wikimedia.org/T327392 : Implement full coverage MathML parsing and mappings

[Hyper-Node]

Basic formula conversion is implemented in Math extension. Chemical formula parser is a work in progress.

[Hyper-Node]

Chemical formula parser done in final review phase, integration as preprocessor to texvc in progress

[Hyper-Node]

Validating all 44k formula and implemented updates for version 4.1.2 of mhchemParser in PHP, validating functionality is done.