Genkit Go 0.0.2

What's Changed

• [Go] improve API by @jba in #523
• [Go] improve the FlowStater interface by @jba in #524
• [Go] improve core action API by @jba in #525
• [Go] remove internal/common by @jba in #529
• [Go] test picoschema with yaml test cases by @jba in #528
• [Go] align Embedder API with JS by @jba in #537
• [Go] plugins/googlai: use batch embed RPC by @jba in #539
• [Go] plugins/googleai: fix locking by @jba in #540
• [Go] add support for GCP client options by @jba in #530
• [Go] pgvector sample by @jba in #583
• [Go] add attribution to googleai and genai plugins by @jba in #601
• [Go] fix system role capability by @jba in #603
• [Go] e2e test for reflection API by @jba in #551

Full Changelog: go/v0.0.1...go/v0.0.2