refactor: replace jest with vitest

package.json

@@ -5,20 +5,19 @@
   "scripts": {
     "typecheck": "tsc --noEmit",
     "build": "rolldown -c",
-    "test": "jest",
+    "test": "vitest",
     "format": "oxfmt --write src/**/*.ts"
   },
   "author": "Timo Behrendt <t.behrendt@t00n.de>",
   "license": "MIT",
   "devDependencies": {
     "@types/conventional-commits-parser": "5.0.2",
-    "@types/jest": "30.0.0",
     "@types/node": "24.13.2",
-    "jest": "30.4.2",
+    "@vitest/coverage-v8": "4.1.10",
     "oxfmt": "0.59.0",
     "rolldown": "1.2.0",
-    "ts-jest": "29.4.11",
-    "typescript": "5.9.3"
+    "typescript": "5.9.3",
+    "vitest": "4.1.10"
   },
   "dependencies": {
     "@actions/core": "3.0.1",