feat: add enableLatex, and enableAsciimath & enableNemeth options

[wendyyuchensun]

Summary

Adds three new boolean options to both createMarkdownToReactParser and createTableOfContents for selectively disabling math parsing extensions. All options default to true (existing behavior unchanged).

• enableLatex — controls LaTeX math parsing (\(…\), $…$)
• enableAsciimath — controls AsciiMath parsing (backtick delimited)
• enableNemeth — controls the Nemeth braille math extension (@…@ syntax)

When both enableLatex and enableAsciimath are false, the math extension is skipped entirely at the processor level. math.js also includes a defensive early return for the same case.

Usage

// Disable LaTeX only — AsciiMath still parsed
createMarkdownToReactParser({
  options: { enableLatex: false },
  components: {},
})(markdown);

// Disable Nemeth braille only
createMarkdownToReactParser({
  options: { enableNemeth: false },
  components: {},
})(markdown);

// Disable all math parsing
createMarkdownToReactParser({
  options: { enableLatex: false, enableAsciimath: false, enableNemeth: false },
  components: {},
})(markdown);

// Same options are available on createTableOfContents
createTableOfContents(markdown, { enableLatex: false, enableNemeth: false });