refactor(agents): migrate LLM/Hermes/Cursor to createAgentAdapter

- LLM: AgentFn<{prompt}> + createAgentAdapter, chatCompletionText unchanged
- Hermes: AgentFn<{prompt}> + createAgentAdapter, config validation in extract
- Cursor: AgentFn<{prompt, workspace}> + createAgentAdapter, workspace
  extraction moved to extract fn, AgentFn itself only receives resolved options

All public API signatures preserved. createTextAdapter/TextProducerFn retained.

Closes #261, Phase 2 of #252

packages/workflow-template-develop/bundle-entry.ts

@@ -8,15 +8,6 @@ import { createWorkflow } from "@uncaged/workflow-runtime";
 import { optionalEnv, requireEnv } from "@uncaged/workflow-util";
 import { buildDevelopDescriptor, developWorkflowDefinition } from "./src/index.js";
 
-const llmProvider = {
-  baseUrl: optionalEnv(
-    "WORKFLOW_LLM_BASE_URL",
-    "https://dashscope.aliyuncs.com/compatible-mode/v1",
-  ),
-  apiKey: requireEnv("WORKFLOW_LLM_API_KEY", "set WORKFLOW_LLM_API_KEY for meta extraction"),
-  model: optionalEnv("WORKFLOW_LLM_MODEL", "qwen-plus"),
-};
-
 const adapter = createCursorAgent({
   command: requireEnv("WORKFLOW_CURSOR_COMMAND", "set WORKFLOW_CURSOR_COMMAND (e.g. cursor-agent)"),
   model: optionalEnv("WORKFLOW_CURSOR_MODEL"),
@@ -24,7 +15,6 @@ const adapter = createCursorAgent({
     ? Number(optionalEnv("WORKFLOW_CURSOR_TIMEOUT"))
     : 0,
   workspace: null,
-  llmProvider,
 });
 
 const wf = createWorkflow(developWorkflowDefinition, { adapter, overrides: null });