rework website and move "demo" link to supported platforms

[nschimme]

Summary by Sourcery

Revamp the website’s entry points to emphasize a platform-agnostic “Get MMapper” flow, including web access, while improving accessibility and automated download recommendations.

New Features:

• Add a Web platform entry point alongside desktop platforms for using MMapper in the browser.
• Introduce keyboard-accessible skip-to-content navigation and ARIA attributes for main navigation and platform links.

Enhancements:

• Generalize download recommendation highlighting to support both traditional downloads and platform links, with ChromeOS users guided specifically to the Web version.
• Retitle platform-specific pages and homepage section from “Download” to “Get MMapper” and add concise guidance text for each OS page.
• Improve styling and positioning of recommendation labels so they work consistently with platform links and existing buttons.

Documentation:

• Update homepage and platform-specific docs to describe platform choices, including a recommended Flathub install for Linux and clearer install instructions for Windows and macOS.

[sourcery-ai]

Reviewer's Guide

Reworks the website’s “Get MMapper” flow to emphasize platform-based entry (including a web demo), improves accessibility, and refactors download highlighting to reuse logic and support platform links and ChromeOS-specific recommendations.

File-Level Changes

Change	Details	Files
Extend download recommendation logic to support platform links and prefer web on ChromeOS while deduplicating recommendation markup creation.	Select both traditional download links and new platform links for recommendation processing. Extract recommendation UI creation into a reusable addRecommendation helper that adds classes and a trailing span. Tag platform links with data-platform and apply a special class for web recommendations and platform-specific styling. Change ChromeOS behavior to only recommend the web platform and avoid recommending any other binaries. Reuse addRecommendation for architecture-matching links instead of inlining DOM manipulation.	docs/assets/js/download-highlight.js
Rework landing page CTA from OS downloads to platform selection, surfacing the web demo and improving accessibility semantics.	Rename the main section from “Download MMapper” to “Get MMapper” and update its anchor for in-page navigation. Introduce a prominent Web platform link pointing to the /demo/ route with proper ARIA labels and icons. Update Windows, macOS, and Linux platform links to use platform-link class and add descriptive aria-labels. Adjust global nav to remove the separate Demo and Download items and replace them with a single Get link targeting the new anchor.	docs/index.md docs/_layouts/default.html
Improve overall accessibility and copy for platform-specific pages, including skip link navigation and clearer installation guidance.	Add a skip-to-content link before the main wrapper and give the an ARIA label and the an ID for better keyboard navigation. Introduce CSS for the skip-link to keep it hidden until focused while ensuring visual prominence when active. Retitle Windows, macOS, and Linux pages from “Download” to “Get” for consistency with the main page. Clarify installation instructions on Windows, macOS, and Linux pages, including recommending the Microsoft Store and Flathub where appropriate, and adjust recommendation text placement on the Windows page.	docs/assets/css/style.css docs/_layouts/default.html docs/windows.md docs/macos.md docs/linux.md

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 25.36%. Comparing base (90eb09d) to head (ae664f2).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #533   +/-   ##
=======================================
  Coverage   25.36%   25.36%           
=======================================
  Files         519      519           
  Lines       43185    43185           
  Branches     4706     4706           
=======================================
  Hits        10952    10952           
  Misses      32233    32233           

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