Update tooling, workflows, and index metadata

[Codex]

Modernizes dependencies, locks down npm behavior, and refreshes workflows while updating page metadata per request.

• Dependencies: Pin eslint@8.57.1 and prettier@3.8.1; disable package-lock generation via .npmrc; ignore and remove package-lock.json.
• Workflows: Delete dependency-review; bump CodeQL to v4.33.0; upgrade Super Linter to v8.5.0, add npm install --no-package-lock, and drop VALIDATE_HTML.
• HTML: Add color-scheme and fediverse meta tags; remove legacy IE compatibility meta and IE11 polyfill.

Example:

<meta name="color-scheme" content="dark light">
<meta name="fediverse:creator" content="@christianoliff@mastodon.social">
<link rel="stylesheet" href="dark-mode.css">

Original prompt

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This section details on the original issue you should resolve

<issue_title>Updates</issue_title>
<issue_description>- Delete package-lock.json

• Prevent package-lock.json being generated in .npmrc
• Pin Prettier to 3.8.1 (latest version)
• Pin ESLint to 8.57.1
• Update GitHub Actions to latest verisons
• Add package-lock.json to .gitignore
• In SuperLinter GH Action - remove VALIDATE_HTML: false
• In SuperLinter GH Action - Add npm install step - after Checkout step.
• Delete dependency-review.yml GH Action
• on Index.html add <meta name="color-scheme" content="dark light">
• on Index.html add <meta name="fediverse:creator" content="@christianoliff@mastodon.social">
• On Index.html, remove <meta http-equiv="x-ua-compatible" content="ie=edge">
• On Index.html, remove <!-- IE 11 polyfill for CSS and Custom Properties --> script</issue_description>

Comments on the Issue (you are @codex[agent] in this section)

• Fixes Updates #209

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[Copilot]

Pull request overview

Updates the project’s Node tooling and GitHub Actions to align with newer dependency versions and revised CI checks, alongside small HTML metadata cleanup for the demo page.

Changes:

• Pin ESLint and Prettier versions; remove package-lock.json and disable lockfile generation.
• Adjust GitHub Actions: update Super Linter + CodeQL pins and remove the dependency review workflow.
• Update index.html metadata and remove legacy IE11 polyfill assets.

Reviewed changes

Copilot reviewed 6 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
package.json	Pins ESLint/Prettier versions to specific releases.
package-lock.json	Removes the lockfile from the repo.
index.html	Adds new meta tags and removes legacy IE compatibility/polyfill code.
.npmrc	Disables package-lock generation and normalizes registry config.
.gitignore	Ignores package-lock.json going forward.
.github/workflows/super-linter.yml	Adds an npm install step, updates Super Linter pin, and enables HTML validation.
.github/workflows/dependency-review.yml	Removes the dependency review workflow.
.github/workflows/codeql-analysis.yml	Updates CodeQL action pins.

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