Add cache-busting fingerprints to JS assets

[Copilot]

JS assets (InfiniteEngine.js, script.js, bootstrap.bundle.min.js) were served without content hashes, causing browsers to serve stale cached versions after deploys — most visibly the Haxe/Lime engine component.

Changes

• layouts/partials/head/infinite-engine.html — pipe InfiniteEngine.js through Hugo's fingerprint, add integrity attribute
• layouts/partials/scripts.html — pipe script.js through fingerprint after minify, add integrity attribute
• layouts/partials/head/bootstrap.html — pipe bootstrap.bundle.min.js through fingerprint, add integrity attribute

CSS was already fingerprinted; this brings JS assets to parity. Each deploy now produces uniquely-named JS URLs, forcing browsers to fetch the latest build.

<!-- before -->
{{ $engine := resources.Get "js/InfiniteEngine.js" }}
<script src="{{ $engine.RelPermalink }}"></script>

<!-- after -->
{{ $engine := resources.Get "js/InfiniteEngine.js" | fingerprint }}
<script src="{{ $engine.RelPermalink }}" integrity="{{ $engine.Data.Integrity }}" crossorigin="anonymous"></script>

[Copilot]

Pull request overview

This PR adds Hugo Pipes fingerprinting (content-hash cache busting) and Subresource Integrity (SRI) attributes to first-party JavaScript assets so browsers reliably fetch updated JS after deploys, aligning JS behavior with the already-fingerprinted CSS pipeline.

Changes:

• Fingerprint InfiniteEngine.js and add integrity + crossorigin on its <script> tag.
• Minify then fingerprint script.js, adding integrity + crossorigin.
• Fingerprint bootstrap.bundle.min.js in production and add integrity (keeping the existing production crossorigin).

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
site/layouts/partials/scripts.html	Adds fingerprint after minify for script.js and emits SRI attributes.
site/layouts/partials/head/infinite-engine.html	Fingerprints InfiniteEngine.js and adds SRI attributes to prevent stale engine JS caching.
site/layouts/partials/head/bootstrap.html	Fingerprints production Bootstrap bundle and adds SRI integrity for the generated asset.

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