feat(ci): build car, pin to cluster, update dnslink

[lidel]

Description

This PR is wip, part of #20.

The goal is to:

• remove dependency on Fleek for inbrowser.link and .dev
• build CAR in CI and attach it to build so it can be downloaded and imported manually
• pin the CID to cluster to ensure multiple providers
• update DNSLinkat inbrowser.link and .dev ourselves

Notes & open questions

• Initial design confirmed to work as expected in job/22106307031: pinned, dnslink updated on test domain.
  • took < 30s
  • note: ttl "1" in Cloudflare DNS API output means "Auto", which is ~300
• Secrets are added to "Deploy" environment, which will be locked down after we are happy with the setup. Right now limited to main and ci-publish-to-ipfs branches.
• Detach .dev from .link and add separate secrets for both to "Deploy" env
• Make both update to the same CID for now (deploy main HEAD)
• Limit publish-to-ipfs stage and "Deploy" env to be run and exposed only on main and release builds

In the future we can change the behavior and:

• .link for stable production (updated only by release event)
• .dev with latest changes from main branch

Change checklist

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation if necessary (this includes comments as well)
• I have added tests that prove my fix is effective or that my feature works

[lidel]

Pausing work for today, will resume tomorrow.

Confirmed initial design works, ./dist output got published to cluster+test-dnslink under 30 seconds:

• https://github.com/ipfs-shipyard/helia-service-worker-gateway/actions/runs/8089796647/job/22106307031?pr=69

And a CAR with the same CID as in DNSLink can be downloaded from build summary page:

• https://github.com/ipfs-shipyard/helia-service-worker-gateway/actions/runs/8089796647?pr=69

[lidel]

Record IDs and secrets for both .link and .dev are in place, merging.

[lidel]

main branch build worked as expected:

DNSLinks got updated: https://github.com/ipfs-shipyard/helia-service-worker-gateway/actions/runs/8114883875/job/22181632552#step:14:21

CAR with the same CID can be fetched from the build Summary page at https://github.com/ipfs-shipyard/helia-service-worker-gateway/actions/runs/8114883875: