instead of having an openai => google translation layer, just add sister functions to the types that construct the google request just like openai's

schema/enum.go

@@ -2,12 +2,11 @@ package schema
 
 import (
 	"errors"
-	"github.com/openai/openai-go"
 	"reflect"
+	"slices"
 
-	"golang.org/x/exp/slices"
-
-	"github.com/sashabaranov/go-openai/jsonschema"
+	"github.com/google/generative-ai-go/genai"
+	"github.com/openai/openai-go"
 )
 
 type enum struct {
@@ -16,10 +15,6 @@ type enum struct {
 	values []string
 }
 
-func (e enum) SchemaType() jsonschema.DataType {
-	return jsonschema.String
-}
-
 func (e enum) FunctionParameters() openai.FunctionParameters {
 	return openai.FunctionParameters{
 		"type":        "string",
@@ -28,10 +23,12 @@ func (e enum) FunctionParameters() openai.FunctionParameters {
 	}
 }
 
-func (e enum) Definition() jsonschema.Definition {
-	def := e.basic.Definition()
-	def.Enum = e.values
-	return def
+func (e enum) GoogleParameters() *genai.Schema {
+	return &genai.Schema{
+		Type:        genai.TypeString,
+		Description: e.Description(),
+		Enum:        e.values,
+	}
 }
 
 func (e enum) FromAny(val any) (reflect.Value, error) {