feat(linter): Improve the oxlint config generated by --init.

[connorshea]

Motivated by #20614, and my own opinion for the last while that the init flag produced a config that was far too verbose.

AI Disclosure: Generated the change with Claude Code, fully reviewed, guided, and tested by me.

Before:

{
  "plugins": null,
  "categories": {},
  "rules": {},
  "settings": {
    "jsx-a11y": {
      "polymorphicPropName": null,
      "components": {},
      "attributes": {}
    },
    "next": {
      "rootDir": []
    },
    "react": {
      "formComponents": [],
      "linkComponents": [],
      "version": null,
      "componentWrapperFunctions": []
    },
    "jsdoc": {
      "ignorePrivate": false,
      "ignoreInternal": false,
      "ignoreReplacesDocs": true,
      "overrideReplacesDocs": true,
      "augmentsExtendsReplacesDocs": false,
      "implementsReplacesDocs": false,
      "exemptDestructuredRootsFromChecks": false,
      "tagNamePreference": {}
    },
    "vitest": {
      "typecheck": false
    }
  },
  "env": {
    "builtin": true
  },
  "globals": {},
  "ignorePatterns": []
}

After this PR:

{
  "$schema": "./node_modules/oxlint/configuration_schema.json",
  "plugins": [
    "typescript",
    "unicorn",
    "oxc"
  ],
  "categories": {
    "correctness": "error"
  },
  "rules": {},
  "env": {
    "builtin": true
  }
}

Also adds a snapshot test for the output of the --init flag, to ensure that we'll know if we change it in the future.

I realize this technically is also a change in that correctness defaults to warn in oxlint with no config file, but I think that's a bad default so I changed it :) We can change it back if we really want to.

When running the snapshot tests I also got a warning about the old insta format being used for one of the snaps, so I force-regen'd them all, which is the reason for a few misc changes in this PR.

[johnpyp]

Could this also default to jsonc, and include comments for anything unclear? (builtin: true would be an example of a place where a comment would be good imo)

[camc314]

nice!

[camc314]

Merge activity

• Mar 25, 10:24 PM UTC: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Mar 25, 10:28 PM UTC: camc314 added this pull request to the Graphite merge queue.
• Mar 25, 10:32 PM UTC: Merged by the Graphite merge queue.