feat: add new database icon and update various icon assets

This commit introduces a new SVG icon for database representation and updates multiple PNG icons in the Tauri application. Key changes include:

- **New Icon**: Added `dbfordevs.svg` for database visualization.
- **Icon Updates**: Modified several existing PNG icons, including sizes 32x32, 64x64, 128x128, and various square logos, ensuring they are up-to-date.

These changes enhance the visual consistency and branding of the application.

Author: danielss-dev