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/workflows/task-core.md

@@ -49,7 +49,8 @@ All task files use this simplified 5-field schema (aligned with workflow-archite
     },
     "target_files": [
       "src/auth/login.ts:handleLogin:75-120",
-      "src/middleware/auth.ts:validateToken"
+      "src/middleware/auth.ts:validateToken",
+      "src/auth/PasswordReset.ts"
     ]
   }
 }
@@ -81,7 +82,7 @@ All task files use this simplified 5-field schema (aligned with workflow-archite
 **Components**:
 - **pre_analysis**: Array of sequential process steps
 - **implementation_approach**: Task execution strategy
-- **target_files**: Specific files to modify in "file:function:lines" format
+- **target_files**: Files to modify/create - existing files in `file:function:lines` format, new files as `file` only
 
 **Step Structure**:
 ```json