* feat: integrate MP3 duration extraction and silence handling
- Added a new dependency on github.com/tcolgate/mp3 for MP3 frame decoding.
- Implemented actual MP3 duration retrieval in the scanRecordings function, falling back to an estimation if retrieval fails.
- Introduced a silent frame asset for generating silence in audio streams.
- Created a silence reader to provide a continuous stream of silent frames.
- Added necessary documentation and licensing for the new MP3 package.
- Updated .gitignore to exclude MP3 files except for the internal data directory.
* feat: update README and improve application configuration and logging
* refactor: remove unused GenerateFileHash function and improve resource cleanup in MP3 and recorder modules
