New UX improvement!

Now the popup UI has a config button that when clicked shows some configuration options. For now I've added the 2 most basic ones:

1. Context menu hiding (for people that may want a less clustered context menu and never use the copy selection feature)
2. Manual theme handling (for users that always want it in dark mode, or always in light mode)

Automatic rollback based on version [1.5.1].

New basic config button in the UI to customize some (very basic for now) options.
Current config options:
- Theme selection (light mode, dark mode or system)
- Show/hide context menu option when right-clicking

Later on I'll add custom delimiters and custom translations.

Nothing changed for users. Simply used script.src instead of fetch in the code.

Major new feature: Typst support!

Now you can copy LaTeX or copy Typst. You can also copy selected text as Markdown or as Typst.

New feature: Right click on selected text (that includes equations) to copy as Markdown.

Nothing new added, just a code re-structuration.

In v1.3:
- Added dark mode
- Replaced check mark emoji with more elegant svg icon.
- Made it compatible with Gemini (data-math)

Added Gemini support.

Added wiikiversity and wikibooks as well.

Only handle MathJax v3 and v4 via API if they are present (for better performance).

New in v1.2

• Added support for different versions and expressions of MathJax.
• Obtained MathJax v3 and v4 LaTeX code via MathJax API (MathJax.startup.document.math).
• Added wikiversity and wikimedia as optional hosts.

For more information see the GitHub repo: github.com/Mapaor/copy-latex-firefox-extension

• Added support for Wikipedia images! Now you can copy their LaTeX code as if it was KaTeX or MathJax
• Improved consistency with font fallbacks for the overlay
• Added new default hosts (so one can disable "all sites" and still work for most popular math websites).

For more information and GIFs and images illustrating use cases see the repo README: https://github.com/Mapaor/copy-latex-firefox-extension.