feat(browser-automation): add playwright-cli as browser automation provider

- Add playwright-cli to BrowserAutomationProviderSchema enum
- Add playwright-cli to BuiltinSkillNameSchema
- Create playwrightCliSkill with official Microsoft template
- Update skill selection logic to handle 3 providers
- Add comprehensive tests for schema and skill selection
- Regenerate JSON schema

Closes #<issue-number-if-any>

src/features/builtin-skills/skills.ts

@@ -4,6 +4,7 @@ import type { BrowserAutomationProvider } from "../../config/schema"
 import {
   playwrightSkill,
   agentBrowserSkill,
+  playwrightCliSkill,
   frontendUiUxSkill,
   gitMasterSkill,
   devBrowserSkill,
@@ -17,7 +18,14 @@ export interface CreateBuiltinSkillsOptions {
 export function createBuiltinSkills(options: CreateBuiltinSkillsOptions = {}): BuiltinSkill[] {
   const { browserProvider = "playwright", disabledSkills } = options
 
-  const browserSkill = browserProvider === "agent-browser" ? agentBrowserSkill : playwrightSkill
+  let browserSkill: BuiltinSkill
+  if (browserProvider === "agent-browser") {
+    browserSkill = agentBrowserSkill
+  } else if (browserProvider === "playwright-cli") {
+    browserSkill = playwrightCliSkill
+  } else {
+    browserSkill = playwrightSkill
+  }
 
   const skills = [browserSkill, frontendUiUxSkill, gitMasterSkill, devBrowserSkill]