feat(best_practice): add code quality scanning and commit message validation

- Implemented a code quality scanner that checks for common clean-code violations in Rust source files, including missing documentation, usage of `.unwrap()` in production code, and commented-out code.
- Introduced a commit message validator that follows the Conventional Commits specification, ensuring proper formatting and providing suggestions for invalid messages.
- Created a unified BestPracticeEngine to encapsulate the functionalities of skills, architecture audits, code quality checks, and commit message validation.
- Added tests for both the code quality scanner and commit message validator to ensure reliability and correctness.

apps/infrastructure/src/lib.rs

@@ -27,6 +27,7 @@
 //! ```
 
 pub mod auth;
+pub mod best_practice;
 pub mod bgbash;
 pub mod guard;
 pub mod ipc;