docs: introduce enriched-html coloring

[hejsztynx]

Summary

Introduced enriched-html color palette, symmetrically how it was done in the reanimated docs, where the theme color was purple. Here it is orange, which encodings i took from the enriched-html landing page.

• introduced orange enriched-html colorings,
• made the swm-red a bit more saturated, so there is a clearer distinction between the swm-red and swm-orange, e.g. between a red :::caution note and a orange, drop-down details,
• links are now blue, easier to spot - just like i the reanimated docs,
• codeblock highlight colors slightly adjusted so the "main" color is orange, instead of reanimated's purple
• added a temporary docs page so you can see what's changed

Testing

Go to colors-demo section where I added a couple elements to see the changes and if they are visually pleasing. Switch between light and dark mode in the docs.

I'll remove the colors-demo once it's ready to merge

Screenshots

Before 🟣 :

After 🟠 :

[Copilot]

Pull request overview

This PR updates the documentation theme to use an enriched-html orange accent (instead of the prior purple), adjusts supporting UI/token colors (including red saturation and link colors), and adds a temporary page to visually validate the new palette in light/dark modes.

Changes:

• Switched theme accent colors (MUI secondary + multiple CSS tokens) to an orange palette and added new orange CSS variables.
• Updated typography/link styling and several UI state tokens (tabs, details, pagination, search, etc.) to match the new accent strategy.
• Adjusted code block highlighting tokens and added a colors-demo page for visual verification.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
docs/src/theme/muiTheme.tsx	Updates MUI theme secondary color to the new orange accent.
docs/src/theme/CodeBlock/highlighting-light.js	Tweaks light-mode syntax highlighting token colors.
docs/src/theme/CodeBlock/highlighting-dark.js	Tweaks dark-mode syntax highlighting token colors.
docs/src/css/typography.css	Updates link underline/border styling to align with new link colors.
docs/src/css/colors.css	Introduces orange palette variables and retunes multiple UI/theme tokens to orange.
docs/docs/fundamentals/colors-demo.md	Adds a demo doc page to preview theme colors and components.

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[kacperzolkiewski]

Nice work 🚀
Right now, the colors match the enriched logo.