chore: set up biome and ci

Author: jonathanlab

.eslintrc.js

@@ -0,0 +1,22 @@
+name: Code quality
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  quality:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+        with:
+          persist-credentials: false
+      - name: Setup Biome
+        uses: biomejs/setup-biome@v2
+        with:
+          version: latest
+      - name: Run Biome
+        run: biome ci .

.github/code-quality.yml

@@ -0,0 +1,57 @@
+{
+  "$schema": "https://biomejs.dev/schemas/2.2.4/schema.json",
+  "vcs": {
+    "enabled": true,
+    "clientKind": "git",
+    "useIgnoreFile": true
+  },
+  "files": {
+    "ignoreUnknown": false
+  },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space",
+    "indentWidth": 2
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true,
+      "nursery": {
+        "useSortedClasses": "error"
+      }
+    },
+    "domains": {
+      "react": "recommended"
+    }
+  },
+  "javascript": {
+    "formatter": {
+      "quoteStyle": "double"
+    }
+  },
+  "assist": {
+    "enabled": true,
+    "actions": {
+      "source": {
+        "organizeImports": "on"
+      }
+    }
+  },
+  "overrides": [
+    {
+      // Files using unknownAtRules
+      "includes": ["src/renderer/styles/globals.css"],
+      "linter": {
+        "enabled": false
+      }
+    },
+    {
+      // API client generates a a lot of Any
+      "includes": ["src/api/generated.ts"],
+      "linter": {
+        "enabled": false
+      }
+    }
+  ]
+}

biome.jsonc

@@ -19,7 +19,9 @@
     "build:electron": "electron-builder",
     "preview": "vite preview",
     "typecheck": "tsc -p tsconfig.node.json --noEmit && tsc -p tsconfig.web.json --noEmit",
-    "lint": "eslint src --ext .ts,.tsx",
+    "lint": "biome check --write",
+    "format": "biome format --write",
+    "check": "pnpm run lint && pnpm run typecheck",
     "generate-client": "tsx scripts/update-openapi-client.ts"
   },
   "keywords": [
@@ -31,6 +33,7 @@
   "author": "PostHog",
   "license": "MIT",
   "devDependencies": {
+    "@biomejs/biome": "2.2.4",
     "@types/node": "^20.11.5",
     "@types/react": "^18.2.48",
     "@types/react-dom": "^18.2.18",
@@ -89,4 +92,4 @@
       "target": "nsis"
     }
   }
-}
+}

package.json

@@ -3,4 +3,4 @@ module.exports = {
     tailwindcss: {},
     autoprefixer: {},
   },
-};
+};