ci: add release workflow, release script and smoke script

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

scripts/smoke.ts

@@ -0,0 +1,22 @@
+// Manual check against a real fastCRW server: prints the raw response shape and mapped results.
+// Usage: CRW_API_URL=http://crw.home:3000 [CRW_API_KEY=...] npm run smoke -- "query"
+import { resolveConfig } from "../src/config.ts"
+import { search } from "../src/search.ts"
+
+const config = resolveConfig({}, process.env)
+const query = process.argv[2] ?? "opencode"
+
+const headers: Record<string, string> = { "Content-Type": "application/json" }
+if (config.apiKey) headers.Authorization = `Bearer ${config.apiKey}`
+const raw = await fetch(`${config.baseURL}/v1/search`, {
+  method: "POST",
+  headers,
+  body: JSON.stringify({ query, limit: config.limit }),
+})
+const body: any = await raw.json().catch(() => undefined)
+console.log(
+  `HTTP ${raw.status}; data shape:`,
+  Array.isArray(body?.data) ? "data[]" : body?.data?.results ? "data.results" : "other",
+)
+
+console.log(await search(config, query, new AbortController().signal))