fix: Playwright build verison conflict

[thelukewalton]

desp: Update yarn deps

[DE7924]

PR Checks Complete

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✅ Testing

[Copilot]

Pull request overview

This PR updates Yarn/dependencies and adjusts the GitHub Action’s Playwright setup step to avoid version conflicts by installing browser binaries for multiple Playwright versions found in node_modules.

Changes:

• Update Yarn (4.17.0 → 4.18.0) and refresh dependency lockfile, including @actions/github major bump.
• Add resolutions to pin/override versions of tar, fast-xml-parser, and undici.
• Update the Playwright install step to scan node_modules for Playwright CLIs and run installs per discovered version.

Reviewed changes

Copilot reviewed 4 out of 11 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
yarn.lock	Lockfile refresh reflecting updated deps and Yarn resolution changes.
package.json	Adds resolutions, bumps deps/devDeps, updates packageManager to Yarn 4.18.0.
.yarnrc.yml	Points Yarn to the 4.18.0 release bundle.
src/scripts/testing.ts	Changes Playwright install behavior to support multiple installed Playwright versions.
dist/licenses.txt	Updates bundled dependency license list after dependency changes.
custom-elements.json	Regenerated custom elements manifest reflecting updated dependency graph/output.

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