fix: fixes the ambient declarations on import (#429)

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Author: lukasholzer

src/main.ts

@@ -1,4 +1,11 @@
+import type { getNetlifyGlobal } from '@netlify/serverless-functions-api'
+
 export { builder } from './lib/builder.js'
 export { schedule } from './lib/schedule.js'
 export { stream } from './lib/stream.js'
 export * from './function/index.js'
+
+// Ambient type declarations
+declare global {
+  const Netlify: ReturnType<typeof getNetlifyGlobal>
+}