Refactor application structure by removing BuildInfo class and integrating its attributes directly into the application context. Update features and views to utilize new string constants for application metadata. Replace UserPref class with a new implementation in pref.py, streamlining user preference management. Enhance instance manager and launcher views to accommodate these changes, ensuring consistent access to application information. Remove deprecated preferences module and adjust related functionality across the codebase.
- Updated `load_instance` function to handle FileNotFoundError gracefully.
- Improved `Launcher` class to update UI elements with instance details after loading.
- Added new properties `image` and `news_feed` to the `Instance` class.
- Introduced JSON schema for instance configuration with new properties.
- Created default instance configuration for "LCE-Hub neoLegacy".
- Added scripts for downloading images and preparing packages.
- Implemented new image handling class for better image management.
- Updated versioning in `main.py` and `uv.lock` for release 0.26.4.11.
- Created a PowerShell script `clean.ps1` to remove build artifacts and temporary files.
- Added default instance configurations for "Default" and "Legacy Evolved" in JSON format.
- Introduced a guide in JSONC format detailing instance setup and configuration.
- Added an About dialog UI in XML format for the application.
- Included a license string for the GNU General Public License v3 in `license_str.py`.
