Add GitHub Actions workflow for Node.js with Webpack

[markusknudtsen-droid]

No description provided.

[github-actions]

PR checks failed

A couple of things need fixing before this can be reviewed.
None of them are about the code itself.

Description is empty or too short.

Please say what the change does and why. If it fixes an open
issue, link it (Fixes #123). Reviewers here port accepted
changes by hand into a private source tree, so a PR that does
not explain itself is expensive to accept and usually is not.

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[Copilot]

Pull request overview

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Adds a GitHub Actions workflow to build the project with Webpack across multiple Node.js versions on pushes and PRs to main.

Changes:

• Introduces a new CI workflow triggered on push / pull_request to main
• Runs a build job on ubuntu-latest with a Node.js version matrix (18/20/22)
• Installs dependencies and runs webpack via npx

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[codebuff-team]

Thanks for the contribution, but this appears to be an unmodified GitHub-generated template (the default "Node.js with Webpack" starter workflow) rather than something tailored to this repo.

Codebuff/Freebuff isn't built with webpack - there's no npx webpack entry point in this codebase, so this workflow would simply fail on every push/PR to main. It also duplicates CI concerns that should live alongside the project's actual build tooling (which is out of scope for this mirror anyway, per packages/build-tools/).

Since this would add a broken, always-failing CI job with no relation to the project's real build process, I can't recommend porting it. If you're interested in improving CI, it'd help to first look at how the project actually builds/tests (e.g. via the existing scripts in package.json) and propose a workflow that matches that, rather than a generic scaffold.

Closing as not applicable to this codebase.