feat: add pre-commit hook for spelling check in contributing guide

Author: KristjanESPERANTO

docs/CONTRIBUTING.md

@@ -160,6 +160,8 @@ Spelling is checked with `cspell`:
 npm run test:spelling
 ```
 
+The repository pre-commit hook also runs this spelling check before each commit.
+
 ### Golden artifacts (regression testing)
 
 Golden artifacts are reference outputs stored in `fixtures/golden/` that serve as snapshots for regression testing. They are a narrow contract guard for published artifacts, not a proof that the full pipeline is semantically correct.

package.json

@@ -55,7 +55,7 @@
     "test:types": "tsc --noEmit"
   },
   "simple-git-hooks": {
-    "pre-commit": "npx lint-staged"
+    "pre-commit": "npx lint-staged && node --run test:spelling"
   },
   "lint-staged": {
     "*": [