Remove profile system and make custom two-stage selection default

- Remove profiles/ directory with all profile JSON files
- Update install.py to remove profile CLI options and simplify flow
- Make interactive two-stage selection (MCP → Components) the default
- Remove ConfigManager.load_profile() method
- Update documentation to reflect simplified installation process
- Add CLAUDEMdManager for intelligent CLAUDE.md import management
- Components now install to root directory with organized @imports
- Preserve user customizations while managing framework imports

This simplifies the installation experience while providing users
direct control over what gets installed through the intuitive
two-stage selection process.

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

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

setup/__init__.py

@@ -12,7 +12,6 @@ from pathlib import Path
 SETUP_DIR = Path(__file__).parent
 PROJECT_ROOT = SETUP_DIR.parent
 CONFIG_DIR = PROJECT_ROOT / "config"
-PROFILES_DIR = PROJECT_ROOT / "profiles"
 
 # Installation target
 DEFAULT_INSTALL_DIR = Path.home() / ".claude"