chore(infra/cspell): add cspell spell checking

cspell.config.cjs

@@ -0,0 +1,30 @@
+const { banWords } = require('cspell-ban-words');
+
+module.exports = {
+  version: '0.2',
+  language: 'en',
+  files: ['**/{*,.*}/**/*.{ts,tsx,js,jsx,md,mdx,yml,yaml}'],
+  enableFiletypes: ['mdx', 'github-actions-workflow'],
+  ignoreRegExpList: [
+    // ignore markdown anchors such as [fooBar](#foobar)
+    '#.*?\\)',
+  ],
+  ignorePaths: [
+    'dist',
+    'dist-*',
+    'compiled',
+    'coverage',
+    'node_modules',
+    'pnpm-lock.yaml',
+    'skills/**/scripts',
+  ],
+  flagWords: banWords,
+  dictionaries: ['dictionary'],
+  dictionaryDefinitions: [
+    {
+      name: 'dictionary',
+      path: './scripts/dictionary.txt',
+      addWords: true,
+    },
+  ],
+};

package.json

@@ -3,8 +3,9 @@
   "private": true,
   "scripts": {
     "build": "pnpm --parallel --filter ./packages/** build",
+    "check-spell": "cspell",
     "format": "prettier --write .",
-    "lint": "biome check",
+    "lint": "biome check && pnpm run check-spell",
     "prepare": "simple-git-hooks && pnpm build"
   },
   "simple-git-hooks": {
@@ -21,6 +22,8 @@
     "@biomejs/biome": "^2.3.13",
     "@rstackjs/config": "workspace:*",
     "@types/node": "^24.10.9",
+    "cspell": "^9.6.4",
+    "cspell-ban-words": "^0.0.4",
     "nano-staged": "^0.9.0",
     "prettier": "^3.8.1",
     "prettier-plugin-packagejson": "^3.0.0",