refactor: switch to cloudflare pages

[lidel]

Closes #244

• [x] removes CI orchestration related to dnslink and loading via gateway infra
• [x] removes coupling between deployments and merges to main or tagging a release
  • we now have separate staging (inbrowser.dev) and production (inbrowser.link) branches which are how things are deployed to inbrowser domains via cloudflare pages

[lidel]

I am merging this to switch CI to follow #244, we can refine text later.

cc @SgtPooki @2color for visibility

Once this lands:

• push to staging deploys to inbrowser.dev
• push to production deploys to inbrowser.link
• they no longer depend on dnslink and ipfs resolution
• release-please only makes release, does not do any automated deployment (did more harm than good)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (4304333) to head (fd01da6). Report is 36 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #247 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 1 1 Lines 35 81 +46 Branches 5 9 +4 ========================================= + Hits 35 81 +46 ``` | [Flag](https://app.codecov.io/gh/ipfs-shipyard/service-worker-gateway/pull/247/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ipfs-shipyard) | Coverage Δ | | |---|---|---| | [node](https://app.codecov.io/gh/ipfs-shipyard/service-worker-gateway/pull/247/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ipfs-shipyard) | `100.00% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ipfs-shipyard#carryforward-flags-in-the-pull-request-comment) to find out more.

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