build(tests): Adds jest to run tests

Milestone: none
Signed-off-by: Alix von Schirp <github@avonschirp.bootmedia.de>

package.json

@@ -29,6 +29,7 @@
   "devDependencies": {
     "@eslint/js": "^9.22.0",
     "@shipgirl/typedoc-plugin-versions": "^0.3.0",
+    "@types/jest": "^29.5.14",
     "@types/node": "^22.13.10",
     "eslint": "^9.22.0",
     "eslint-config-prettier": "^10.1.1",
@@ -36,8 +37,10 @@
     "finepack": "^2.12.7",
     "globals": "^16.0.0",
     "husky": "^9.1.7",
+    "jest": "^29.7.0",
     "lint-staged": "^15.4.3",
     "prettier": "3.5.3",
+    "ts-jest": "^29.2.6",
     "typedoc": "^0.27.9",
     "typedoc-github-theme": "^0.2.1",
     "typedoc-plugin-coverage": "^3.4.1",
@@ -60,6 +63,7 @@
     "format:check": "prettier --check .",
     "lint": "eslint --cache .",
     "prepare": "husky",
+    "test": "jest",
     "typecheck": "tsc --noEmit"
   },
   "private": true,