Extract repeated InitCli instance creation into helper functions:
- create_test_init_cli() for default test instances
- create_test_init_cli_with_force() for force-enabled instances
This reduces code duplication and makes test setup more maintainable.
- Make parse_config_root() public for reuse in main.rs
- Add get_rules_path() helper to extract and resolve rules path from config
- Update main CLI to use configured rules path for default rule execution
- Add run_with_rules_path() method to RulesCli for custom path support
- Update all unit tests to include rules_dir field
- Rules path now supports h:, c:, r: prefixes throughout the application
