chore: add 1.0.0 release notes

Author: vicentereig

CHANGELOG.md

@@ -1,4 +1,10 @@
 # Changelog
 
+## [1.0.0] - 2025-10-26
+- First stable release of the typed Exa API client.
+- Covers search, research, websets, monitors, imports, events, and webhooks resources based on the OpenAPI spec.
+- Adds Sorbet-backed request/response structs, schema-aware structured output helpers, retrying transport, and streaming utilities.
+- Bundles developer ergonomics: connection pooling, pagination helpers, JSON/SSE streaming, and extensive README docs.
+
 ## [0.1.0] - 2025-10-25
 - Initial gem scaffolding.