Move shaka-player font patching into a webpack loader

[absidue]

Pull Request Type

• Other

Description

I originally placed the shaka-player patching in a postinstall script as it used to patch more things (adding export default shaka to the types -> shaka-player does that itself now and downloading the google material icons font -> shaka-player now uses SVG in JS for its icons), but now that it only need to do a find-and-replace to make shaka-player reference the Roboto font that is already in this repository rather than on Google Fonts, it doesn't need to be a script anymore.

In light of the Shai Hulud and Shai Hulud 2 security incidents in 2025, which along with other things, also injected malicious postinstall scripts into npm packages, people have started preventing postinstall scripts from running entirely or only allow listing specific ones. As none of the postinstall scripts that run in the FreeTube repository are essential, switching to a webpack loader will let us disable running postinstall scripts in our GitHub Actions pipelines.

Testing

1. rm -rf node_modules/shaka-player
2. yarn install --check-files
3. yarn run pack:renderer
4. npx prettier@2.8.8 --no-config --write dist/renderer.*.css
5. Search for @font-face in the dist/renderer.*.css file (it should only include the one pointing to the local Roboto font)

Desktop

• OS: Windows
• OS Version: 11