fix: resolve ember-raf-scheduler to its ESM addon source for the lots-of-data demo

[Copilot]

/3-demos/lots-of-data crashed with [object Object] because Vite's pre-bundler couldn't correctly handle ember-raf-scheduler v0.3 (a v1 Ember addon).

What broke

@html-next/vertical-collection v5 imports { Token, scheduler } from ember-raf-scheduler, but that package's root index.js is a bare CJS ember-addon shim — no ESM exports. Vite wraps it with __commonJS and mistranslates the inner require('./package') call as window.require('./package'), which doesn't exist in the browser.

Fix

Added a resolve.alias in docs-app/vite.config.js pointing ember-raf-scheduler at its addon/index.js, which is proper ESM and exports Token and scheduler as expected. The path is resolved dynamically relative to where pnpm installs @html-next/vertical-collection, so it's not hardcoded.

const vcMain = _require.resolve('@html-next/vertical-collection');
const vcNodeModules = path.dirname(path.dirname(path.dirname(path.dirname(vcMain))));
const emberRafSchedulerAddon = path.join(vcNodeModules, 'ember-raf-scheduler', 'addon', 'index.js');

// in defineConfig:
resolve: {
  alias: { 'ember-raf-scheduler': emberRafSchedulerAddon },
}

Result

The page now renders the live DBMon benchmark with FPS counter and a virtualized 200-row table updating at requestAnimationFrame speed.

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