feat: add GoogleGeminiV1 to ReasoningFormat and update related tests

Author: petrbrzek

src/reasoning-details-schema.ts

@@ -5,6 +5,7 @@ export const ReasoningFormat = {
   OpenAIResponsesV1: "openai-responses-v1",
   XAIResponsesV1: "xai-responses-v1",
   AnthropicClaudeV1: "anthropic-claude-v1",
+  GoogleGeminiV1: "google-gemini-v1",
 } as const
 
 export type ReasoningFormat =
@@ -31,6 +32,7 @@ export const CommonReasoningDetailSchema = z.object({
       ReasoningFormat.OpenAIResponsesV1,
       ReasoningFormat.XAIResponsesV1,
       ReasoningFormat.AnthropicClaudeV1,
+      ReasoningFormat.GoogleGeminiV1,
     ])
     .nullish(),
   index: z.number().optional(),

src/reasoning-details.spec.ts

@@ -237,6 +237,7 @@ describe("ReasoningFormat enum", () => {
     expect(ReasoningFormat.OpenAIResponsesV1).toBe("openai-responses-v1")
     expect(ReasoningFormat.XAIResponsesV1).toBe("xai-responses-v1")
     expect(ReasoningFormat.AnthropicClaudeV1).toBe("anthropic-claude-v1")
+    expect(ReasoningFormat.GoogleGeminiV1).toBe("google-gemini-v1")
   })
 })
 
@@ -255,6 +256,7 @@ describe("Reasoning details with all format types", () => {
       ReasoningFormat.OpenAIResponsesV1,
       ReasoningFormat.XAIResponsesV1,
       ReasoningFormat.AnthropicClaudeV1,
+      ReasoningFormat.GoogleGeminiV1,
     ]
 
     formats.forEach((format) => {