Refactor Winget functions into a dedicated module

Extracts Winget-related functionalities, including search, list management, installation, and download tasks, from `BuildFFUVM_UI.ps1` and `FFUUI.Core.psm1`.
Consolidates these features into a new module, `FFUUI.Core.Winget.psm1`, to improve code organization and maintainability.

FFUDevelopment/BuildFFUVM_UI.ps1

@@ -1763,144 +1763,6 @@ $window.Add_Loaded({
 
     })
 
-# Function to search for Winget apps
-function Search-WingetApps {
-    param(
-        [Parameter(Mandatory = $true)]
-        [psobject]$State
-    )
-    try {
-        $searchQuery = $State.Controls.txtWingetSearch.Text
-        if ([string]::IsNullOrWhiteSpace($searchQuery)) { return }
-
-        # Get current items from the ListView
-        $currentItemsInListView = @()
-        if ($null -ne $State.Controls.lstWingetResults.ItemsSource) {
-            $currentItemsInListView = @($State.Controls.lstWingetResults.ItemsSource)
-        }
-        elseif ($State.Controls.lstWingetResults.HasItems) {
-            $currentItemsInListView = @($State.Controls.lstWingetResults.Items)
-        }
-
-        # Store selected apps from the current view
-        $selectedAppsFromView = @($currentItemsInListView | Where-Object { $_.IsSelected })
-
-        # Search for new apps
-        $searchedAppResults = Search-WingetPackagesPublic -Query $searchQuery | ForEach-Object {
-            [PSCustomObject]@{
-                IsSelected     = $false # New items are not selected by default
-                Name           = $_.Name
-                Id             = $_.Id
-                Version        = $_.Version
-                Source         = $_.Source
-                DownloadStatus = ""
-            }
-        }
-
-        $finalAppList = [System.Collections.Generic.List[object]]::new()
-        $addedAppIds = [System.Collections.Generic.HashSet[string]]::new([System.StringComparer]::OrdinalIgnoreCase)
-
-        # Add previously selected apps first
-        foreach ($app in $selectedAppsFromView) {
-            $finalAppList.Add($app)
-            $addedAppIds.Add($app.Id) | Out-Null
-        }
-
-        # Add new search results, avoiding duplicates of already added (selected) apps
-        foreach ($result in $searchedAppResults) {
-            if (-not $addedAppIds.Contains($result.Id)) {
-                $finalAppList.Add($result)
-                $addedAppIds.Add($result.Id) | Out-Null # Track added IDs to prevent duplicates from search results themselves
-            }
-        }
-
-        # Update the ListView's ItemsSource
-        $script:uiState.Controls.lstWingetResults.ItemsSource = $finalAppList.ToArray()
-    }
-    catch {
-        [System.Windows.MessageBox]::Show("Error searching for apps: $_", "Error", "OK", "Error")
-    }
-}
-
-# Function to save selected apps to JSON
-function Save-WingetList {
-    param(
-        [Parameter(Mandatory = $true)]
-        [psobject]$State
-    )
-    try {
-        $selectedApps = $State.Controls.lstWingetResults.Items | Where-Object { $_.IsSelected }
-        if (-not $selectedApps) {
-            [System.Windows.MessageBox]::Show("No apps selected to save.", "Warning", "OK", "Warning")
-            return
-        }
-
-        $appList = @{
-            apps = @($selectedApps | ForEach-Object {
-                    [ordered]@{
-                        name   = $_.Name
-                        id     = $_.Id
-                        source = $_.Source.ToLower()
-                    }
-                })
-        }
-
-        $sfd = New-Object System.Windows.Forms.SaveFileDialog
-        $sfd.Filter = "JSON files (*.json)|*.json"
-        $sfd.Title = "Save App List"
-        $sfd.InitialDirectory = $AppsPath
-        $sfd.FileName = "AppList.json"
-
-        if ($sfd.ShowDialog() -eq [System.Windows.Forms.DialogResult]::OK) {
-            $appList | ConvertTo-Json -Depth 10 | Set-Content $sfd.FileName -Encoding UTF8
-            [System.Windows.MessageBox]::Show("App list saved successfully.", "Success", "OK", "Information")
-        }
-    }
-    catch {
-        [System.Windows.MessageBox]::Show("Error saving app list: $_", "Error", "OK", "Error")
-    }
-}
-
-# Function to import app list from JSON
-function Import-WingetList {
-    param(
-        [Parameter(Mandatory = $true)]
-        [psobject]$State
-    )
-    try {
-        $ofd = New-Object System.Windows.Forms.OpenFileDialog
-        $ofd.Filter = "JSON files (*.json)|*.json"
-        $ofd.Title = "Import App List"
-        $ofd.InitialDirectory = $AppsPath
-
-        if ($ofd.ShowDialog() -eq [System.Windows.Forms.DialogResult]::OK) {
-            $importedAppsData = Get-Content $ofd.FileName -Raw | ConvertFrom-Json
-
-            $newAppListForItemsSource = [System.Collections.Generic.List[object]]::new()
-
-            if ($null -ne $importedAppsData.apps) {
-                foreach ($appInfo in $importedAppsData.apps) {
-                    $newAppListForItemsSource.Add([PSCustomObject]@{
-                            IsSelected     = $true # Imported apps are marked as selected
-                            Name           = $appInfo.name
-                            Id             = $appInfo.id
-                            Version        = ""  # Will be populated when searching or if data exists
-                            Source         = $appInfo.source
-                            DownloadStatus = ""
-                        })
-                }
-            }
-
-            $State.Controls.lstWingetResults.ItemsSource = $newAppListForItemsSource.ToArray()
-
-            [System.Windows.MessageBox]::Show("App list imported successfully.", "Success", "OK", "Information")
-        }
-    }
-    catch {
-        [System.Windows.MessageBox]::Show("Error importing app list: $_", "Error", "OK", "Error")
-    }
-}
-
 # Function to remove application and reorder priorities
 function Remove-Application {
     param(