chore: Add biome

[7nohe]

• Use Biome to lint and format code
• Run Biome on CI (only on ubuntu-latest)
• Run Biome at pre-commit
• Upgrade pnpm to v9

https://biomejs.dev/

[seriouslag]

Biome looks cool, but with Eslint and Prettier, both being supported and used by @hey-api/open API-ts.

I would suggest we use those as I do not believe Biome to be such a benefit to lose out on compatibility checks. Maybe we can use biome for the root of the project and prettier/eslint for a specific test project but also why bother to do so.

[7nohe]

@seriouslag
Although this project depends on @hey-api/openapi-ts, I feel that linters and formatters are not very relevant. Moreover, managing plugins and rule settings with two separate packages, Prettier and ESLint, can be complex, so I would like to choose an option that is as simple and modern as possible.

[seriouslag]

@seriouslag Although this project depends on @hey-api/openapi-ts, I feel that linters and formatters are not very relevant. Moreover, managing plugins and rule settings with two separate packages, Prettier and ESLint, can be complex, so I would like to choose an option that is as simple and modern as possible.

I understand what you are saying and disagree with it, as I do not feel this is the same as you are saying.
We allow users to pass in options invoking the prettier/eslint config to run in the underlying tool.
Being a wrapper and extension of the said package, I feel we should use the same tooling.

We do not have to follow their same linting rules or anything. I do not understand why we would deviate, it seems arbitrary to want to use a non-industry standard linter/formatter.

I see no benefit in using biome over eslint/prettier, when we have a clear benefit with the other way around.

[7nohe]

Indeed, you are right. I hadn't noticed that there is a new format option. I will close this PR.
I've been seeing a trend of switching to Biome around me, so I thought it would be good to adopt it. It might be a good idea to suggest Biome for the @hey-api/openapi-ts project as well