Bump project version to 4.7.0

Bump project version to 4.7.0

Update folder24.png icon

Suits better to the other flat-style icons

Bump DABstar version to 4.5.0 in CMakeLists.txt

Suppress continuity index warning for the first packet

Add stub libraries and update paths for AppImage creation

Fix scan logic by correcting mIsScanning condition

Refactor file type handling in OpenFileDialog

Update version to 3.10.0

- Updated version number in project files and documentation.
- Reflected version change in README references and headings.
- Replaced images in the `res/for_readme` folder with updated versions.

Replace std::vector with std::array to ensure 32-byte alignment