Add comprehensive workflows for CLI tools usage, coding philosophy, context requirements, file modification, and CodexLens auto hybrid mode

- Introduced a detailed guide for intelligent tools selection strategy, including quick reference, tool specifications, prompt templates, and best practices for CLI execution.
- Established a coding philosophy document outlining core beliefs, simplicity principles, and guidelines for effective coding practices.
- Created context requirements documentation emphasizing the importance of understanding existing patterns and dependencies before implementation.
- Developed a file modification workflow detailing the use of edit_file and write_file MCP tools, along with priority logic for file reading and editing.
- Implemented CodexLens auto hybrid mode, enhancing the CLI with automatic vector embedding generation and default hybrid search mode based on embedding availability.

.claude/agents/cli-execution-agent.md

@@ -134,7 +134,7 @@ RULES: $(cat {selected_template}) | {constraints}
 ```
 analyze|plan → gemini (qwen fallback) + mode=analysis
 execute (simple|medium) → gemini (qwen fallback) + mode=write
-execute (complex) → codex + mode=auto
+execute (complex) → codex + mode=write
 discuss → multi (gemini + codex parallel)
 ```
 
@@ -165,9 +165,9 @@ RULES: $(cat ~/.claude/workflows/cli-templates/prompts/analysis/pattern.txt)
 ccw cli exec "..." --tool gemini --mode write --cd {dir}
 ```
 
-**Codex (Auto)**:
+**Codex (Write)**:
 ```bash
-ccw cli exec "..." --tool codex --mode auto --cd {dir}
+ccw cli exec "..." --tool codex --mode write --cd {dir}
 ```
 
 **Cross-Directory** (Gemini/Qwen):