build: add bun

[davidlj95]

Includes many changes for this to work

Package manager replacement

• Remove package-lock.json and add bun.lockb after installing
• Configure Bun's lockfile diff to use bun given it's a binary file
• Add run scripts to use bun instead of npm. Or instead ts-node (which uses node runtime). Prefix them with bun: so we can keep NPM / Node ones for some time in case we regret something

Scripting

Many changes, that include improvements to previous setup despite setting up Bun along the way

• Use ts extensions by adding allowImportingTsExtensions to tsconfig.json
• Remove allowSyntheticDefaultImports to avoid confusing magic to happen. If it's a default one, import it as it. Otherwise, don't.
• Add ts-node config to import app files as ESM files. This allows us to mark those files as ESM without adding mts extension or type: module to package.json (that we can't as doing so makes the SSR tasks fail). Therefore the exports are as expected: what you export (with export) is what you can later import. Otherwise, Node.js for compatibility would add a non-existing default import. And then the imports got weird
  • When importing this way, without the Node.js magic default import, then we can run scripts with bun, yay! 🥳
• Allow importing without extensions when running scripts via Node. By adding --experimental-specifier-resolution=node to Node run args when running ts-node. Otherwise, we would have to add .ts extensions when importing there. Which is a bit uglier.
  • Otherwise, we could run it with bun. But not with node, as requires the extension as per ES modules requirements.

CI/CD

• Sets up bun using their action
• Install dependencies using frozen lockfile option
• Removes setting up Node.js
• Adds cache for bun global cache
  • Despite maybe it slows down the process actually!
  • But will help if NPM registry is down or some dep gets removed, etc...
• Update .ci/Makefile to use new bun run scripts and use bunx to run Lighthouse

Wins

• Script runs way faster: from 28s to 10s in my machine
• Awesome speed for installs 🚀
  • Seems build times in CI/CD haven't improved so much though

[davidlj95]

Current dependencies on/for this PR:

• main
  • PR build: add bun #173 👈

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