[WIP] Try deno

[HappyPaul55]

Just a test run to help solve some of our problems.

Deno has lots of things out-of-the-box like, formatting, typescript, test and great securuty. This helps us cull a large number of dependancies which get security issues and cause us to do a lot of security bump patches. Maybe deno can help this as it reduces our dependancy footprint.

[Copilot]

Copilot reviewed 25 out of 30 changed files in this pull request and generated no comments.

Files not reviewed (5)

• .devcontainer/devcontainer.json: Language not supported
• .eslintignore: Language not supported
• .npmrc: Language not supported
• package.json: Language not supported
• src/main.css: Language not supported

Comments suppressed due to low confidence (4)

src/App.tsx:5

• Ensure that the removal of flatpickr and tippy CSS imports is intentional, as it may impact application styling if these resources are still needed.

import "flatpickr/dist/themes/light.css";

jest/fileTransform.js:1

• Review the removal of jest transforms to confirm that all test assets are now correctly handled by Deno's testing framework.

const path = require("path");

.eslintrc.js:1

• Verify that the removal of the ESLint configuration is fully covered by Deno linting to maintain consistent code quality checks.

module.exports = {

.github/workflows/pr_build.yml:73

• Confirm that the syntax 'deno fmt manifest.json -- --fix' is supported and behaves as expected in the Deno version used for the CI/CD pipeline.

deno fmt manifest.json -- --fix

[github-actions]

Build for commit 747195d deployed to: https://companies-house-pr-44.ci.next.deskprodemo.com

URLs:
https://companies-house-pr-44.ci.next.deskprodemo.com/horizon-ui/app