@inngest/ai: Gemini adapter + Grok OpenAI-compatible support (#884)

- **Gemini**: does not support tool calling via their OpenAI compatible
API -> full adapter
- **Grok**: OpenAI compatible API but does not support strict parameters
with function calls -> partial adapter on top of openai

Author: charlypoly

.changeset/new-ghosts-train.md

@@ -0,0 +1,5 @@
+---
+"@inngest/ai": patch
+---
+
+`@inngest/ai`: Gemini adapter + Grok OpenAI-compatible support

packages/ai/src/adapter.ts

@@ -1,4 +1,7 @@
+/* eslint-disable @typescript-eslint/no-namespace */
 import { type AnthropicAiAdapter } from "./adapters/anthropic.js";
+import { type GeminiAiAdapter } from "./adapters/gemini.js";
+import { type GrokAiAdapter } from "./adapters/grok.js";
 import { type OpenAiAiAdapter } from "./adapters/openai.js";
 
 /**
@@ -102,7 +105,7 @@ export namespace AiAdapter {
   /**
    * Supported I/O formats for AI models.
    */
-  export type Format = "openai-chat" | "anthropic";
+  export type Format = "openai-chat" | "anthropic" | "gemini" | "grok";
 
   /**
    * A function that creates a model that adheres to an existng AI adapter
@@ -120,6 +123,8 @@ export namespace AiAdapter {
 const adapters = {
   "openai-chat": null as unknown as OpenAiAiAdapter,
   anthropic: null as unknown as AnthropicAiAdapter,
+  gemini: null as unknown as GeminiAiAdapter,
+  grok: null as unknown as GrokAiAdapter,
 } satisfies Record<AiAdapter.Format, AiAdapter>;
 
 /**