build: add jest, tests

package.json

@@ -12,8 +12,10 @@
     "build": "pnpm run build:package && pnpm run build:docs",
     "build:package": "rm -rf dist && tsc --module ESNext --outdir dist/esm && tsc --module commonjs --outdir dist/cjs",
     "build:docs": "typedoc --includeVersion --sourceLinkTemplate 'https://git.resultium.net/public/utils/src/commit/{gitRevision}/{path}#L{line}' --plugin typedoc-plugin-markdown src",
-    "prepublish": "pnpm run build",
-    "lint": "eslint src"
+    "prepublish": "pnpm run test && pnpm run build",
+    "lint": "eslint src",
+    "test": "jest",
+    "test:coverage": "jest --coverage"
   },
   "repository": {
     "type": "git",
@@ -29,6 +31,7 @@
   },
   "license": "GPL-3.0-or-later",
   "devDependencies": {
+    "@jest/globals": "^29.7.0",
     "@types/node": "^20.11.25",
     "@typescript-eslint/eslint-plugin": "^7.2.0",
     "@typescript-eslint/parser": "^7.2.0",
@@ -36,7 +39,9 @@
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-prefer-arrow": "^1.2.3",
     "eslint-plugin-security": "^2.1.1",
+    "jest": "^29.7.0",
     "prettier": "^3.2.5",
+    "ts-jest": "^29.1.2",
     "typedoc": "^0.25.12",
     "typedoc-plugin-markdown": "^3.17.1",
     "typescript": "^5.4.2"