feat: Add Microsoft Graph and OpenXml module installation to Install-Dependencies.ps1

Install-Dependencies.ps1

@@ -5,23 +5,51 @@ Installs prerequisites for SharePoint XLS Converter application
 #>
 
 # Enable TLS 1.2 for secure connections
-[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+[Net.ServicePointManager]::SecurityProtocol = [Net.ServicePointProtocolType]::Tls12
 
 Write-Host "Installing required modules..." -ForegroundColor Cyan
 
-# Install PnP.PowerShell module if not exists
-if (-not (Get-Module -ListAvailable -Name PnP.PowerShell)) {
+# Install Microsoft.Graph modules
+$graphModules = @(
+    "Microsoft.Graph.Sites",
+    "Microsoft.Graph.Files",
+    "Microsoft.Graph.Authentication"
+)
+
+foreach ($module in $graphModules) {
+    if (-not (Get-Module -ListAvailable -Name $module)) {
+        try {
+            Install-Module $module -Scope CurrentUser -Force -AllowClobber
+            Write-Host "$module module installed successfully" -ForegroundColor Green
+        }
+        catch {
+            Write-Host "Failed to install $module: $_" -ForegroundColor Red
+            exit 1
+        }
+    }
+    else {
+        Write-Host "$module module is already installed" -ForegroundColor Yellow
+    }
+}
+
+# Install DocumentFormat.OpenXml module
+if (-not (Get-Module -ListAvailable -Name DocumentFormat.OpenXml)) {
     try {
-        Install-Module PnP.PowerShell -Scope CurrentUser -Force -AllowClobber
-        Write-Host "PnP.PowerShell module installed successfully" -ForegroundColor Green
+        # Install NuGet package provider if not exists
+        if (-not (Get-PackageProvider -Name NuGet)) {
+            Install-PackageProvider -Name NuGet -Force
+        }
+        Install-Module DocumentFormat.OpenXml -Scope CurrentUser -Force -AllowClobber
+        Write-Host "DocumentFormat.OpenXml module installed successfully" -ForegroundColor Green
     }
     catch {
-        Write-Host "Failed to install PnP.PowerShell: $_" -ForegroundColor Red
-        exit 1
+        Write-Host "Failed to install DocumentFormat.OpenXml module: $_" -ForegroundColor Red
+        Write-Host "You may need to install the Open XML SDK manually." -ForegroundColor Yellow
+        # Do not exit, as the application might still work if the assembly is in the GAC or a known path
     }
 }
 else {
-    Write-Host "PnP.PowerShell module is already installed" -ForegroundColor Yellow
+    Write-Host "DocumentFormat.OpenXml module is already installed" -ForegroundColor Yellow
 }
 
 # Check for Excel installation