chore(nitro): drop cjs build and clean up package exports

Nitro 3 is ESM-only, so the cjs output was shipping dead code. Also
removes a broken typesVersions entry pointing at build/types/plugins.d.ts
(file never existed, no consumer imports @sentry/nitro/plugins).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: logaretm

packages/nitro/package.json

@@ -12,23 +12,13 @@
   "files": [
     "/build"
   ],
-  "main": "build/esm/index.js",
   "module": "build/esm/index.js",
   "types": "build/types/index.d.ts",
-  "typesVersions": {
-    "*": {
-      "plugins": [
-        "build/types/plugins.d.ts"
-      ]
-    }
-  },
   "exports": {
     "./package.json": "./package.json",
     ".": {
       "types": "./build/types/index.d.ts",
-      "node": {
-        "import": "./build/esm/index.js"
-      }
+      "default": "./build/esm/index.js"
     }
   },
   "publishConfig": {

packages/nitro/rollup.npm.config.mjs

@@ -8,5 +8,6 @@ export default [
         external: [/^nitro/, /^h3/, /^srvx/, /^@sentry\/opentelemetry/, '@sentry/bundler-plugin-core'],
       },
     }),
+    { emitCjs: false },
   ),
 ];