feat: add read-only bird boundary

src/features/posts/bird-client.server.ts

@@ -0,0 +1,13 @@
+import { TwitterClient } from '@yuta/bird'
+import type { BirdReader } from './post-service'
+
+let client: TwitterClient | undefined
+
+export function getBirdReader(): BirdReader {
+  client ??= new TwitterClient({
+    relayBaseUrl: process.env.TWITTER_RELAY_BASE_URL,
+    profileName: process.env.BIRD_PROFILE_NAME,
+    timeoutMs: 20_000,
+  })
+  return client
+}