chore: build size check comment on PR

[aixaCode]

Pull Request Description

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[github-actions]

Windows and Mac build successful in Unity Cloud! You can find a link to the downloadable artifact below.

Name	Link
Commit	a4d6bb0
Logs	https://github.com/decentraland/unity-explorer/actions/runs/22351998943
Download Windows	https://github.com/decentraland/unity-explorer/suites/58384798780/artifacts/5635516325
Download Windows S3	https://explorer-artifacts.decentraland.org/@dcl/unity-explorer/branch/chore/build-size-check-on-pr/wd-19057-a4d6bb0/Decentraland_windows64.zip
Download Mac	https://github.com/decentraland/unity-explorer/suites/58384798780/artifacts/5635537097
Download Mac S3	https://explorer-artifacts.decentraland.org/@dcl/unity-explorer/branch/chore/build-size-check-on-pr/wd-19057-a4d6bb0/Decentraland_macos.zip
Built on	2026-02-24T13:37:10Z