Introduce CSpell

package.json

@@ -16,6 +16,7 @@
     "typedoc": "rimraf ./build && typedoc src/index.ts --tsconfig tsconfig.typedoc.json",
     "style": "prettier -l \"src/**/*.ts\"",
     "style.fix": "npm run style -- --write",
+    "cspell": "cspell  \"/**/*.{ts,scss,html}\"",
     "fix-types": "ts-node --skip-project scripts/types-absolute-fixer.ts",
     "e2e": "ts-node scripts/e2e.ts",
     "serve.docs": "cd docs && docsify serve",
@@ -73,6 +74,7 @@
     "@types/webpack": "^5.0.0",
     "buffer": "^6.0.3",
     "chai": "^3.5.0",
+    "cspell": "^6.2.2",
     "docsify-cli": "^4.3.0",
     "glob": "^8.0.1",
     "jszip": "^3.1.5",