docs: Enhance target_files documentation and fix cross-platform command compatibility

## Target Files Enhancement
- Add support for new file creation in target_files format
- Update task-generate.md with comprehensive target_files generation guide
- Update concept-enhanced.md to output code modification targets
- Add examples showing both modification (file:function:lines) and creation (file) formats

## Cross-Platform Command Fixes
- Replace ls with find commands for better Windows Git Bash compatibility
- Update workflow commands: execute.md, status.md, review.md
- Update session commands: list.md, complete.md
- Add Bash environment guidelines to context-search-strategy.md
- Document forbidden Windows commands (findstr, dir, where, etc.)

## Files Updated
- Core workflows: workflow-architecture.md, task-core.md
- Command docs: 9 workflow command files
- Agent docs: action-planning-agent.md, task-generate-agent.md
- Strategy docs: context-search-strategy.md

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.claude/commands/workflow/execute.md

@@ -356,8 +356,8 @@ Task(subagent_type="{meta.agent}",
 
      **WORKFLOW COMPLETION CHECK**:
      After updating task status, check if workflow is complete:
-     total_tasks=\$(ls .workflow/*/\.task/*.json | wc -l)
-     completed_tasks=\$(ls .workflow/*/\.summaries/*.md 2>/dev/null | wc -l)
+     total_tasks=\$(find .workflow/*/\.task/ -name "*.json" -type f 2>/dev/null | wc -l)
+     completed_tasks=\$(find .workflow/*/\.summaries/ -name "*.md" -type f 2>/dev/null | wc -l)
      if [ \$total_tasks -eq \$completed_tasks ]; then
        SlashCommand(command=\"/workflow:session:complete\")
      fi"),
@@ -433,7 +433,7 @@ Task(subagent_type="{meta.agent}",
       "task_description": "Implement following consolidated synthesis specification...",
       "modification_points": ["Apply synthesis specification requirements..."]
     },
-    "target_files": ["file:function:lines"]
+    "target_files": ["file:function:lines", "path/to/NewFile.ts"]
   }
 }
 ```