feat(ai): add Qwen Token Plan as built-in provider (#6858)

Add Alibaba Cloud Model Studio Token Plan subscription service as two
built-in API-key providers: qwen-token-plan (international, Singapore)
and qwen-token-plan-cn (China, Beijing).

Each provider exposes 15 text-generation models (Qwen, DeepSeek, GLM,
Kimi, MiniMax) via the OpenAI-compatible endpoint with DashScope
enable_thinking support. Model metadata is sourced from models.dev;
qwen3.8-max-preview is hardcoded until models.dev includes it.

Also fixes kimi-coding test references (k2p7 -> kimi-for-coding) after
models.dev catalog update picked up by generate-models.

Closes #6850

packages/ai/src/models.generated.ts

@@ -27,6 +27,8 @@ import { OPENAI_CODEX_MODELS } from "./providers/openai-codex.models.ts";
 import { OPENCODE_MODELS } from "./providers/opencode.models.ts";
 import { OPENCODE_GO_MODELS } from "./providers/opencode-go.models.ts";
 import { OPENROUTER_MODELS } from "./providers/openrouter.models.ts";
+import { QWEN_TOKEN_PLAN_MODELS } from "./providers/qwen-token-plan.models.ts";
+import { QWEN_TOKEN_PLAN_CN_MODELS } from "./providers/qwen-token-plan-cn.models.ts";
 import { TOGETHER_MODELS } from "./providers/together.models.ts";
 import { VERCEL_AI_GATEWAY_MODELS } from "./providers/vercel-ai-gateway.models.ts";
 import { XAI_MODELS } from "./providers/xai.models.ts";
@@ -64,6 +66,8 @@ export const MODELS = {
 	"opencode": OPENCODE_MODELS,
 	"opencode-go": OPENCODE_GO_MODELS,
 	"openrouter": OPENROUTER_MODELS,
+	"qwen-token-plan": QWEN_TOKEN_PLAN_MODELS,
+	"qwen-token-plan-cn": QWEN_TOKEN_PLAN_CN_MODELS,
 	"together": TOGETHER_MODELS,
 	"vercel-ai-gateway": VERCEL_AI_GATEWAY_MODELS,
 	"xai": XAI_MODELS,