fix(release): stop the publish hooks from racing each other

changeset publish runs every package concurrently, so each package's prepublishOnly ran rm -rf dist followed by a rebuild at the same time. core deleted its own dist while the fastify adapter was type checking against it, failing build:types with TS2307 and blocking @seamless-auth/fastify from publishing.

release:stable already runs pnpm build in topological order before changeset publish, so the per-package rebuild was redundant. Replace it with a check that the dist output exists, which also keeps a publish from silently shipping a tarball with no dist.

Author: Bccorb

packages/core/package.json

@@ -47,7 +47,7 @@
     "scripts": {
         "build": "tsc -p tsconfig.json",
         "clean": "rm -rf dist",
-        "prepublishOnly": "pnpm run clean && pnpm run build",
+        "prepublishOnly": "test -f dist/index.js && test -f dist/index.d.ts || (echo 'dist is missing build output; run pnpm build before publishing' >&2 && exit 1)",
         "test": "pnpm run build && NODE_OPTIONS=--experimental-vm-modules jest",
         "test:watch": "pnpm run build && NODE_OPTIONS=--experimental-vm-modules jest --watch"
     },

packages/express/package.json

@@ -39,7 +39,7 @@
     "build:types": "tsc -p tsconfig.build.json",
     "clean": "rm -rf dist",
     "dev": "tsc --watch",
-    "prepublishOnly": "pnpm run clean && pnpm run build",
+    "prepublishOnly": "test -f dist/index.js && test -f dist/index.d.ts || (echo 'dist is missing build output; run pnpm build before publishing' >&2 && exit 1)",
     "test": "pnpm --filter @seamless-auth/core build && pnpm run build && NODE_OPTIONS=--experimental-vm-modules jest",
     "test:watch": "pnpm --filter @seamless-auth/core build && pnpm run build && NODE_OPTIONS=--experimental-vm-modules jest --watch"
   },

packages/fastify/package.json

@@ -39,7 +39,7 @@
     "build:types": "tsc -p tsconfig.build.json",
     "clean": "rm -rf dist",
     "dev": "tsc --watch",
-    "prepublishOnly": "pnpm run clean && pnpm run build",
+    "prepublishOnly": "test -f dist/index.js && test -f dist/index.d.ts || (echo 'dist is missing build output; run pnpm build before publishing' >&2 && exit 1)",
     "test": "pnpm --filter @seamless-auth/core build && pnpm run build && NODE_OPTIONS=--experimental-vm-modules jest",
     "test:watch": "pnpm --filter @seamless-auth/core build && pnpm run build && NODE_OPTIONS=--experimental-vm-modules jest --watch"
   },