Add FH6 autoshow tools and localization; improve SQL pointer scanning and process attachment

[Vynxly]

Motivation

• Add FH6-specific autoshow/sql tools and UI so users can run common FH6 tweaks from the app.
• Make SQL AOB scanning more robust across multiple signatures and address offsets to reliably resolve the database pointer.
• Improve process attachment detection to handle Microsoft Store installs and fallback process lookup by name/ID.

Description

• ForzaHorizon5/Sql.cs: introduced DbSigs array and looped AOB scans, added TryResolveDatabasePointer to probe offsets and validate virtual function entries before setting _ptr, and improved error reporting; retained GetVirtualFunctionPtr helper.
• ViewModels/Pages/AutoshowViewModel.cs: added FreeUpgradeTables list and several SQL command properties (InstallFlagsSql, FullAutoshowSql, FreeAllUpgradesSql, FreeWheelsSql, DriftScoreSql, MaxTractionSql, TorqueScaleSql, DragScaleSql) and wired ExecuteSql to run them.
• Views/Pages/Autoshow.xaml and Views/SubPages/SelfVehicle/Unlocks.xaml: added FH6 UI elements ("FH6 Additions" section and FH6 Tools tab) with buttons bound to the new SQL commands and corresponding XAML styling.
• Views/SubPages/SelfVehicle/Unlocks.xaml.cs: added ToolViewModel property to expose the autoshow tool commands to the Unlocks view.
• ViewModels/Windows/MainWindowViewModel.cs: added TryOpenProcess, GetPlatform, IsMicrosoftStoreGamePath, GetMicrosoftStoreUpdate, and TryGetPackageRoot to improve attachment handling for Microsoft Store packages and to search processes by name/ID as a fallback, plus related constants and minor refactor of GvpMaker.
• Resources/Translations (English, French, ChineseSimplified): added FH6 localization keys for the new UI entries.

Testing

• Built the solution with dotnet build, which completed successfully.
• Ran dotnet test, which discovered no automated unit tests in this repository (no failures reported).

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Codex Task