build: replace eslint with biome and upgrade typescript to 7

typescript-eslint does not support TypeScript 7 yet, so retire ESLint
and lint with Biome, which the site repositories already use.

- Enable the Biome linter with the recommended preset
- Turn off noAssignInExpressions for the inline offset advances in
  the binary header parsers
- Exclude dist instead of build from Biome
- Run biome lint for the lint and lint:fix scripts
- Remove eslint, @eslint/js and the typescript-eslint packages
- Upgrade typescript to 7.0.2, tsdown to 0.23.0 and biome to 2.5.13

biome.json

@@ -1,5 +1,5 @@
 {
-  "$schema": "https://biomejs.dev/schemas/2.4.16/schema.json",
+  "$schema": "https://biomejs.dev/schemas/2.5.13/schema.json",
   "vcs": {
     "enabled": true,
     "clientKind": "git",
@@ -7,7 +7,7 @@
   },
   "files": {
     "ignoreUnknown": false,
-    "includes": ["**", "!**/build", "!**/node_modules"]
+    "includes": ["**", "!**/dist", "!**/node_modules"]
   },
   "formatter": {
     "enabled": true,
@@ -16,7 +16,13 @@
     "lineWidth": 120
   },
   "linter": {
-    "enabled": false
+    "enabled": true,
+    "rules": {
+      "preset": "recommended",
+      "suspicious": {
+        "noAssignInExpressions": "off"
+      }
+    }
   },
   "assist": { "actions": { "source": { "organizeImports": "on" } } },
   "javascript": {

eslint.config.js

@@ -1,10 +0,0 @@
-import js from '@eslint/js';
-import tseslint from '@typescript-eslint/eslint-plugin';
-
-export default [
-  js.configs.recommended,
-  ...tseslint.configs['flat/recommended'],
-  {
-    ignores: ['dist/**', 'node_modules/**'],
-  },
-];

package.json

@@ -33,8 +33,8 @@
   },
   "scripts": {
     "build": "tsdown",
-    "lint": "eslint 'src/**/*.ts'",
-    "lint:fix": "eslint --fix 'src/**/*.ts'",
+    "lint": "biome lint .",
+    "lint:fix": "biome lint --write .",
     "format": "biome format --write .",
     "format:check": "biome format .",
     "check": "biome check .",
@@ -44,12 +44,8 @@
     "release": "npm publish"
   },
   "devDependencies": {
-    "@biomejs/biome": "^2.4.16",
-    "@eslint/js": "^10.0.1",
-    "@typescript-eslint/eslint-plugin": "^8.60.0",
-    "@typescript-eslint/parser": "^8.60.0",
-    "eslint": "^10.4.0",
-    "tsdown": "^0.22.0",
-    "typescript": "^6.0.3"
+    "@biomejs/biome": "^2.5.13",
+    "tsdown": "^0.23.0",
+    "typescript": "^7.0.2"
   }
 }