refactor!: remove next.js (#3267)

apps/core/tsconfig.server.json

@@ -0,0 +1,13 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "composite": true,
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleResolution": "Node",
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "outDir": "./lib/server"
+  },
+  "include": ["server.mts"]
+}