feat: add @affine/sdk (#3536)

packages/sdk/tsconfig.node.json

@@ -0,0 +1,12 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "composite": true,
+    "module": "ESNext",
+    "moduleResolution": "Node",
+    "allowSyntheticDefaultImports": true,
+    "outDir": "lib",
+    "noEmit": false
+  },
+  "include": ["vite.config.ts"]
+}