Add a bundle analyze command

[zetter-rpf]

This will make it easier for us to check and understand size changes to webpack bundles.

In the future we could use a github action to automate generating and tracking this.

To use run yarn analyze. This will build the project and open a browser to explore.

See example in #1333

[Copilot]

Pull request overview

Adds an opt-in yarn analyze workflow to generate a Webpack bundle report to help track and understand bundle size changes over time.

Changes:

• Add webpack-bundle-analyzer dependency and lockfile entries.
• Add an analyze npm script that builds with analysis enabled.
• Wire BundleAnalyzerPlugin into webpack.config.js behind an environment flag.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 1 comment.

File	Description
package.json	Adds analyze script and webpack-bundle-analyzer dev dependency.
webpack.config.js	Conditionally adds BundleAnalyzerPlugin during builds.
yarn.lock	Updates lockfile to include analyzer and transitive dependencies.

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