Added SQLite database support for managing device information and common data. Implemented DAOs for handling device and common data operations, such as inserting/updating devices and tracking the last scan time. Enhanced `DeviceScreener` to read device info, update database records, and take screenshots.
Added a background worker using QThread for device screening and integrated Tesseract OCR for text recognition from images. Refactored project structure, updated CMakeLists for Tesseract support, and adjusted .gitignore for build files.
