Tracking issue: Replace ESLint and Prettier with Biome

[davidjgoss]

There is some friction with our current setup for linting:

• TypeScript-related ESLint parser/plugin packages frequently come into conflict with the typescript dependency itself and slow down upgrade cycles
• Migrating from ESLint 9.x to 10.x (where support for the legacy config is gone) doesn't bring us any particular benefits and comes with a bunch more dependency headaches
• ESLint isn't exactly slow, but it's not fast either

We gave Biome a try in cucumber/react-components#485 to good effect. It does configuration in a way that makes sense to me, has zero dependencies, and is very fast.

At this point, it's no more effort (maybe less) to migrate any of our projects to Biome than it is to go through the ESLint 10.x upgrade. So Biome it is, and since it also handles formatting we can do without the additional dependency of Prettier as well.

We'll track the work under this ticket and close it when we're fully migrated to Biome for active Cucumber projects.

(I'm in no way dunking on any of these tools. They're all huge technical and community achievements that have served us very well, they're just not the right trade off here any more.)

[davidjgoss]

We now have a shared base config here https://github.com/cucumber/biome-config

[davidjgoss]

Migration tracker:

• messages Replace ESLint and Prettier with Biome messages#408
• message-streams Update and simplify tooling and packaging message-streams#87
• gherkin Add Biome gherkin#568
• gherkin-streams Replace ESLint and Prettier with Biome gherkin-streams#137
• gherkin-utils Replace ESLint and Prettier with Biome gherkin-utils#170
• cucumber-expressions Replace ESLint and Prettier with Biome cucumber-expressions#409
• tag-expressions Replace ESLint and Prettier with Biome tag-expressions#266
• javascript-core Replace ESLint and Prettier with Biome javascript-core#55
• compatibility-kit Replace ESLint and Prettier with Biome compatibility-kit#262
• query Replace ESLint and Prettier with Biome query#160
• html-formatter Replace ESLint and Prettier with Biome html-formatter#498
• junit-xml-formatter Replace ESLint and Prettier with Biome junit-xml-formatter#147
• pretty-formatter Replace ESLint and Prettier with Biome pretty-formatter#97
• cucumber-json-converter Replace ESLint and Prettier with Biome cucumber-json-converter#106
• ci-environment Replace ESLint and Prettier with Biome ci-environment#331
• cucumber-js Replace ESLint and Prettier with Biome cucumber-js#2822
• cucumber-node Replace ESLint and Prettier with Biome cucumber-node#220
• cucumber-reports Replace ESLint and Prettier with Biome cucumber-reports#84