Add smart icon detection and visual feedback improvements

[Inokinoki]

This commit implements comprehensive improvements to the EFI Boot Manager KCM, including bug fixes, missing method implementations, and enhanced visual feedback.

Core Features:

• Fix icon detection functions that were declared but never called
• Add OS type, icon, and device icon detection to boot entries
• Implement lastOperationSuccess and lastOperationEntryId properties
• Add currentFilter and currentSortOrder properties for UI state tracking

Bug Fixes:

• Fix detailsForEntry() to include iconName, accentColor, deviceIcon, isBootNext, isCurrent
• Fix wrong object reference in navigation (kcm.manager.data → entries.data)
• Add missing isVisible property to delegate
• Fix property access in delegate (name, entryIdHex, path → delegate.name, etc.)

Missing Method Implementations:

• Context menu: verifyEntryFiles, repairEntry, toggleEntryFavorite, testBootEntry, analyzeDependencies
• Toolbar actions: getDiagnostics, validateEntries, verifyAllEntries, getBootStats, getBootHistory
• System info: checkSecureBoot, getFirmwareInfo, autoRepairAllEntries, optimizeBootOrder
• Data access: getEfiVariables, getAuditLog, benchmarkBootPerformance, getSystemBootLog
• UI control: sortEntries, filterByOsType, resetFilter

Enhanced OS Detection:

• Add detection for: Rocky Linux, AlmaLinux, NixOS, Alpine, Void, MX Linux, deepin
• Improve Ubuntu flavors: Kubuntu, Xubuntu, Lubuntu, MATE, Studio, Budgie, Kylin
• Add Arch variants: Garuda, Arco Linux
• Add openSUSE variants: Tumbleweed, Leap
• Add Windows edition shortcuts: Win11, Win10, Win8, Win7
• Use QLatin1StringView for better performance

Visual Feedback:

• Add loading indicators for icon loading
• Implement automatic fallback to "computer" icon on error
• Enhance details dialog with status badges (Current, BootNext, Default, Visible)
• Add operation result animations tied to specific entries

New Signals:

• dependenciesAnalyzed, diagnosticsReady, entriesValidated
• bootStatsReady, bootHistoryReady, systemBootLogReady
• secureBootChecked, firmwareInfoReady, bootOrderOptimized
• efiVariablesReady, auditLogReady, bootBenchmarkComplete
• lastOperationEntryIdChanged, currentFilterChanged, currentSortOrderChanged

Code Quality:

• Add validateIconName() helper function for safe icon fallback
• Extract and track entryId in runAuthAction() for operation tracking
• Proper error handling and null checks in all new methods
• Consistent use of delegate property prefix throughout UI