feat: enhance JSON serialization safety & add dxt upload limit (#230)

tsconfig.test.json

@@ -0,0 +1,12 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "NodeNext",
+    "isolatedModules": true,
+    "types": ["jest", "node"]
+  },
+  "include": ["src/**/*", "tests/**/*"],
+  "exclude": ["node_modules", "dist"]
+}