Added foundational modules for core functionalities:

- Introduced `walk.rs` as a parallel directory walker for search operations.
- Implemented basic index handling in `commands/index.rs`.
- Created `utils/config.rs` for configuration management with placeholders for future enhancements.

src/utils/mod.rs

@@ -0,0 +1,6 @@
+pub mod project;
+pub mod config;
+
+// Re-export commonly used functions for convenience
+pub use project::{get_project_info, sanitize_project_name};
+pub use config::Config;