fix: build shared package for runtime

packages/shared/package.json

@@ -3,16 +3,19 @@
   "version": "0.1.0",
   "private": true,
   "type": "module",
-  "main": "./src/index.ts",
-  "types": "./src/index.ts",
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
   "exports": {
-    ".": "./src/index.ts"
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js"
+    }
   },
   "scripts": {
     "typecheck": "tsc --noEmit",
-    "build": "echo 'shared is source-only'",
+    "build": "tsc -p tsconfig.json",
     "lint": "echo 'skip'",
-    "dev": "echo 'shared is source-only'"
+    "dev": "tsc -p tsconfig.json --watch"
   },
   "dependencies": {
     "zod": "^3.23.8"

packages/shared/tsconfig.json

@@ -3,7 +3,7 @@
   "compilerOptions": {
     "rootDir": "./src",
     "outDir": "./dist",
-    "noEmit": true
+    "noEmit": false
   },
   "include": ["src/**/*"]
 }