Music Helper 0.1.0 (example copy)

A small tool that runs on your PC for filling a website's music page. Drop in
MP3s: it reads each file's title, lyrics, cover art and song link from its
tags, sorts the songs into collections, lets you time the lyrics so they light
up line by line as the song plays, and builds the site's music page from them.

This copy is for seeing how it works. It comes with an empty example site
(example-site), and publishing is switched off: nothing is uploaded anywhere,
and it can't change any real website.

To try it:
1. Install Node.js 20 or newer (https://nodejs.org).
2. Double-click "Music Helper.cmd". It opens http://localhost:5191 in your
   browser.
3. Drop a few of your MP3s on the page (tagged MP3s fill in their title,
   lyrics and cover by themselves; for others, type them in).
4. Press the clock on a song with lyrics to time them: Space as each line
   begins. Already have an .lrc file for it? "Load LRC" brings its timing in.
   The Lyric Timer (a separate download) makes .lrc files, and comes in a
   download with this helper where the two work together.
5. Press Preview to see the example site's music page.

Everything you add is saved in example-site\music. The code is in helper.mjs
(the local server) and helper.html (the page, including reading the tags and
timing the lyrics).
