feat(hetzner): add Effect-based Cloud and DNS API clients

[codeagencybe]

Implements the Hetzner Cloud and DNS HTTP client infrastructure for the v2 (alchemy-effect) codebase, following the Neon/api.ts Effect pattern.

Files added

• packages/alchemy/src/Hetzner/Cloud/Credentials.ts — Context.Service-based credential service that reads HCLOUD_TOKEN from env; exposes fromToken and fromEnv layers
• packages/alchemy/src/Hetzner/Cloud/Client.ts — typed get/post/put/patch/del helpers wrapping HttpClient; base URL https://api.hetzner.cloud/v1; HetznerApiError with Data.TaggedError; auto-retry 429/5xx with Schedule.exponential
• packages/alchemy/src/Hetzner/Cloud/DnsCredentials.ts — same pattern for DNS; reads HETZNER_DNS_API_TOKEN
• packages/alchemy/src/Hetzner/Cloud/DnsClient.ts — DNS client; base URL https://dns.hetzner.com/api/v1; uses Auth-API-Token header; HetznerDnsApiError

Usage

// Cloud API
const servers = yield* CloudClient.get<{ servers: Server[] }>("/servers").pipe(
  Effect.provide(CloudCredentials.fromEnv()),
  Effect.provide(FetchHttpClient.layer),
);

// DNS API
const zones = yield* DnsClient.get<{ zones: Zone[] }>("/zones").pipe(
  Effect.provide(DnsCredentials.fromEnv()),
  Effect.provide(FetchHttpClient.layer),
);

[sam-goodwin]

Did you mean to create resources? This looks like an API client, not an alchemy resource provider. Did you mean to create the sdk over here https://github.com/alchemy-run/distilled?