Add elevenlabs platform

Define common types for elevenlabs.

README.md

@@ -20,3 +20,6 @@ Many-in-one AI client.
   - [ ] files
   - [ ] fine-tunes
   - [ ] moderations
+* ElevenLabs
+  - [ ] TTS (stream)
+  - [ ] get voices

src/platforms/elevenlabs/common.ts

@@ -0,0 +1,9 @@
+export const enum ApiVersion {
+  V1 = 'v1',
+}
+
+export interface Configuration {
+  apiKey: string;
+  apiVersion: ApiVersion;
+  baseUrl?: string;
+}

src/platforms/elevenlabs/index.ts

@@ -0,0 +1,10 @@
+import { Configuration } from './common';
+
+export * from './common';
+
+export const PLATFORM_ID = 'elevenlabs' as const;
+
+export interface PlatformConfig {
+  platform: typeof PLATFORM_ID;
+  platformConfiguration: Configuration;
+}

src/platforms/openai/common.ts

@@ -38,7 +38,7 @@ export class PlatformError extends Error {
   }
 }
 
-export enum ApiVersion {
+export const enum ApiVersion {
   V1 = 'v1',
 }