feat(docker): Add support for multiple platforms in Docker action

[gondoi]

Summary

Checklist

• I've added error handling for all actions/requests, and verified how this error will show on UI. (or there was no error handling)
• I've reviewed all the copy changed/added in this PR, using AI if needed. (or there was no copy changes)
• I've included the reference to the issues being closed from Github and/or Linear (or there was no issues)
• I've changed the Docs to reflect my changes (or it was not needed)
• I've put docs links where it may be helpful (or it was not needed)
• I checked the resulting UI both in Light and Dark mode (or no UI changes were made)
• I reviewed the entire PR myself (preferably, on GH UI)

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Project	Deployment	Actions	Updated (UTC)
fuel-explorer-v2-vite	Ready	Preview	May 27, 2026 3:47pm

[cursor]

PR Summary

Medium Risk
Changes how production images are built and pushed (multi-runner native builds); misconfiguration could break releases or PR image builds on ghcr.io.

Overview
Docker image publishing is moved from an in-repo composite action to the shared FuelLabs/github-actions reusable workflow docker-build-push.yml, and the local .github/actions/docker-publish action is removed.

The docker-publish workflow now declares packages: write and id-token: write, passes registry credentials and build inputs (including linux/amd64 and linux/arm64, separate amd64/arm64 runners, and the same tag patterns) to the reusable workflow instead of checking out and invoking the composite action on a single runner.

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