Remove gitpod references from codebase

[jimchamp]

Closes #11306

Removes link to Gitpod from project README files.
Removes Gitpod configuration file and set-up script.
Removes references to Gitpod from comment strings.
Removes code related to Gitpod from service worker utilities and their tests.

Technical

Testing

Screenshot

Stakeholders

[Copilot]

Pull request overview

This pull request aims to deprecate Gitpod from the Open Library project in response to issue #11306, which notes that Gitpod has pivoted to a different service (Ona). The PR removes the Gitpod badge from the main README and deletes the .gitpod.yml configuration file.

Key changes:

• Removed Gitpod badge from the top badges section of the main README
• Deleted the entire .gitpod.yml configuration file containing port configurations, tasks, and setup commands

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
Readme.md	Removes the Gitpod badge from the project badges section at the top of the README
.gitpod.yml	Completely deletes the Gitpod configuration file that defined ports, tasks, and setup commands for the Gitpod environment

Note: This PR is incomplete. Multiple Gitpod references remain throughout the codebase, including in the main README (lines 47-50), localized README files, docker documentation, setup scripts, and functional code. A more comprehensive approach is needed to fully deprecate Gitpod as described in the linked issue.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[RayBB]

🫡 it was good while it lasted. OL now seems to run much better on my laptop then back when we started with gitpod