refactor(infra): directory structure (#4615)

packages/backend/server/tests/tsconfig.json

@@ -0,0 +1,23 @@
+{
+  "extends": "../../../../tsconfig.json",
+  "compilerOptions": {
+    "composite": true,
+    "target": "ESNext",
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "rootDir": ".",
+    "outDir": "../lib/tests",
+    "verbatimModuleSyntax": false,
+    "tsBuildInfoFile": "../lib/tests/.tsbuildinfo"
+  },
+  "references": [
+    {
+      "path": "../tsconfig.json"
+    },
+    {
+      "path": "../../../../tests/kit/tsconfig.json"
+    }
+  ],
+  "include": ["."],
+  "exclude": []
+}