Fix visuals for Avalonia components and bump pinget to 0.10.0

[Gabriel Dufresne (GabrielDuf)]

This pull request includes several UI improvements and a dependency update. The most significant changes enhance the visual consistency and focus handling of card controls, update the appearance of underlines to use a more neutral color, and update a package dependency. Additionally, some redundant code related to the expansion state of the install options expander has been removed.

UI Improvements:

• Improved focus handling and border rendering for SettingsCard controls, ensuring focused cards always have a complete border and restoring the original border thickness when focus is lost (SettingsCard.cs).
• Refined the appearance of the InfoBar control by adding rounded corners, a uniform border, and margin for a more modern look (InfoBar.axaml).
• Changed the underline color for search and query fields from the accent color to a secondary text fill color for better visual consistency (MainWindow.axaml, AbstractPackagesPage.axaml).

Dependency Updates:

• Updated the Devolutions.Pinget.Cli.Rust package from version 0.9.0 to 0.10.0 (UniGetUI.Avalonia.csproj).

Code Cleanup:

• Removed code that explicitly set the expanded state of the install options expander, likely to allow for more flexible or user-driven control (PackageDetailsWindow.axaml.cs).