docs: fix command name inconsistencies across documentation

Fix multiple command naming and parameter inconsistencies:

1. Command Name Fixes:
   - Change /cli:mode:bug-index to /cli:mode:bug-diagnosis
   - Affected files: COMMAND_REFERENCE.md, COMMAND_SPEC.md,
     EXAMPLES.md, GETTING_STARTED.md, GETTING_STARTED_CN.md,
     PROJECT_INTRODUCTION.md

2. Parameter Fixes:
   - Remove invalid --tool parameter from /workflow:lite-plan
   - The lite-plan command does not support --tool flag
   - Affected files: README.md, README_CN.md, COMMAND_SPEC.md

3. Invalid Command Fixes in PROJECT_INTRODUCTION.md:
   - Change /gemini:analyze to /cli:analyze --tool gemini
   - Change /qwen:mode:plan to /cli:mode:plan --tool qwen
   - Change /codex:mode:auto to /cli:execute --tool codex
   - Change /workflow:plan-deep to /workflow:plan
   - These legacy command formats are no longer valid

Impact:
- All documentation now matches actual command implementations
- Users will not encounter "command not found" errors
- Examples are now executable and correct
- Consistent command syntax across all docs

Files modified: 8
- COMMAND_REFERENCE.md
- COMMAND_SPEC.md
- EXAMPLES.md
- GETTING_STARTED.md
- GETTING_STARTED_CN.md
- PROJECT_INTRODUCTION.md
- README.md
- README_CN.md

GETTING_STARTED_CN.md

@@ -182,7 +182,7 @@
 
 ```bash
 # 分析 Bug
-/cli:mode:bug-index "密码错误时仍显示成功消息"
+/cli:mode:bug-diagnosis "密码错误时仍显示成功消息"
 
 # Claude 会分析后直接根据分析结果实现修复
 ```
@@ -233,7 +233,7 @@ CCW 支持通过统一的 CLI 接口直接调用外部 AI 工具（Gemini、Qwen
 /cli:mode:code-analysis --tool qwen "分析 src/utils/ 目录下的工具函数"
 
 # Bug 分析模式
-/cli:mode:bug-index --tool gemini "分析内存泄漏问题的可能原因"
+/cli:mode:bug-diagnosis --tool gemini "分析内存泄漏问题的可能原因"
 ```
 
 ### 工具语义调用