Enhance audio capture functionality and update dependencies

- Added support for capturing system audio on Windows using WASAPI with improved error handling and thread safety.
- Introduced the 'scopeguard' crate for better resource management during audio capture.
- Updated Cargo.toml to include 'scopeguard' and modified Windows-specific dependencies for enhanced functionality.
- Added a new test for validating audio capture output, ensuring the captured audio data is valid and non-empty.

tauri/src-tauri/src/lib.rs

@@ -0,0 +1 @@
+pub mod audio_capture;