Fix TypeScript 6 compatibility: add test-specific tsconfig with jest types

Agent-Logs-Url: https://github.com/TypedRest/TypedRest-TypeScript/sessions/927cfaab-4c6c-4431-88a4-86f55a7db209

Co-authored-by: bastianeicher <414366+bastianeicher@users.noreply.github.com>

Author: Copilot

jest.config.js

@@ -7,6 +7,6 @@ module.exports = {
     "**/?(*.)+(spec|test).ts"
   ],
   transform: {
-    "\\.ts$": "ts-jest"
+    "\\.ts$": ["ts-jest", { tsconfig: "tsconfig.test.json" }]
   },
 };

tsconfig.test.json

@@ -0,0 +1,12 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "types": ["jest", "node"]
+  },
+  "include": [
+    "**/*.test.ts"
+  ],
+  "exclude": [
+    "node_modules"
+  ]
+}