feat: support VertexAI provider (#153)

* support: vertexai

fix

fix

set default for vertexai

added comment

fix

fix

* create schema

* fix README.md

* fix order

* added pupularity

* set tools if tools is exists

restore commentout

* fix comment

* set summarizer model

cmd/schema/main.go

@@ -227,6 +227,7 @@ func generateSchema() map[string]any {
 		string(models.ProviderOpenRouter),
 		string(models.ProviderBedrock),
 		string(models.ProviderAzure),
+		string(models.ProviderVertexAI),
 	}
 
 	providerSchema["additionalProperties"].(map[string]any)["properties"].(map[string]any)["provider"] = map[string]any{