Adds cloud manager api

[micheleriva]

Example API:

import { CloudManager } from '@oramacloud/client'

const manager = new CloudManager({ api_key: 'HDks8Hkao82-ha9daj' }) // <--- Private API key
const indexManager = manager.index('h7asdjk9d12kdlofabsha123') // <--- index ID

await indexManager.empty()
await indexManager.insert([{ id: "1", name: "John Doe" }, { id: "2", name: "Jane Doe" }])
await indexManager.update({ id: "2", name: "Jane Don" })
await indexManager.delete({ id: "1" })
await indexManager.deploy()