feat: standardize request_user_input schema across all codex skills and add config reminder

- Update all 68 .codex/skills files to use correct request_user_input schema
  (header, id, question, options with label/description)
- Remove deprecated multiSelect, type, value, prompt fields
- Add mandatory confirmation gates to planning-only skills
- Add Codex config.toml reminder to ccw install CLI
- Add Codex configuration section to README.md and README_CN.md

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.codex/skills/team-frontend-debug/agents/completion-handler.md

@@ -34,7 +34,7 @@ Interactive agent for handling pipeline completion action. Presents debug summar
 | Tool | Type | Purpose |
 |------|------|---------|
 | `Read` | built-in | Load task results and artifacts |
-| `AskUserQuestion` | built-in | Get user completion choice |
+| `request_user_input` | built-in | Get user completion choice |
 | `Write` | built-in | Store completion result |
 | `Bash` | built-in | Execute archive/export operations |
 
@@ -79,11 +79,11 @@ Interactive agent for handling pipeline completion action. Presents debug summar
 2. Present completion choice:
 
 ```javascript
-AskUserQuestion({
+request_user_input({
   questions: [{
     question: "Debug pipeline complete. What would you like to do?",
     header: "Completion",
-    multiSelect: false,
+    id: "completion_action",
     options: [
       { label: "Archive & Clean (Recommended)", description: "Archive session, output final summary" },
       { label: "Keep Active", description: "Keep session for follow-up debugging" },

.codex/skills/team-frontend-debug/agents/conditional-skip-gate.md

@@ -35,7 +35,7 @@ Interactive agent for evaluating TEST-001 results and determining whether to ski
 | Tool | Type | Purpose |
 |------|------|---------|
 | `Read` | built-in | Load test results and issues |
-| `AskUserQuestion` | built-in | Get user decision on warnings |
+| `request_user_input` | built-in | Get user decision on warnings |
 | `Write` | built-in | Store gate decision result |
 
 ---
@@ -81,13 +81,13 @@ Interactive agent for evaluating TEST-001 results and determining whether to ski
 2. If only warnings, present choice:
 
 ```javascript
-AskUserQuestion({
+request_user_input({
   questions: [{
     question: "Testing found only low-severity warnings. How would you like to proceed?",
     header: "Test Results",
-    multiSelect: false,
+    id: "warning_decision",
     options: [
-      { label: "Fix warnings", description: "Proceed with analysis and fixes for warnings" },
+      { label: "Fix warnings (Recommended)", description: "Proceed with analysis and fixes for warnings" },
       { label: "Complete", description: "Accept current state, skip remaining tasks" }
     ]
   }]