feat: mathjax-3

[arzola]

This pull request includes significant updates to the MathJax integration and various code simplifications in the src/imageGenerator.js file. The most important changes are listed below:

MathJax Integration Update:

• Replaced mathjax-node with mathjax-full for better performance and more features. Updated the package.json to reflect this change.
• Refactored the MathJax initialization and configuration to use the new mathjax-full components (TeX, SVG, liteAdaptor, RegisterHTMLHandler).

Code Simplifications:

• Simplified the inArray function by replacing it with the Array.prototype.includes method.
• Improved the isValidColor function by using a more concise regular expression test.
• Removed unnecessary comments and redundant code, streamlining the generate function for better readability and maintainability.

[pkra]

Just a random note that MathJax v4 has been in beta for over a year. Depending on your timeline (and theirs), it might be worth skipping v3.

[arzola]

Hey @pkra thank you for your feedback, we appreciate that a lot we are planning to release this new version next sprint ~2 weeks, but we will open an experimental branch with the beta version to start testing our libraries with that version in parallel

[pkra]

@arzola no worries. I realize how random my comment was. I helped pb with some questions years ago (when I was still working for MathJax) and I was still subscribed to the repository.

[arzola]

@pkra not problem at all, in fact we truly appreciate your input, we want to provide good support for tons of different math notations and modules