v1.15 — PowerShell edition + repo restructure

- New powershell/InstaSoftOfficeTool.ps1: single-file WPF GUI version
  - Same Fluent Design UI, no compilation needed
  - Runs on any Windows 7+ with PowerShell 5.1 (built-in)
  - Chrome won't flag .ps1 files as "rarely downloaded"
  - Auto-elevates to admin
- Moved C# source to src/ subfolder
- Updated .gitignore for nested bin/obj folders

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Services/OdtDownloader.cs

@@ -1,113 +0,0 @@
-using System;
-using System.IO;
-using System.Net.Http;
-using System.Threading.Tasks;
-
-namespace InstaSoftOfficeTool.Services
-{
-    public class OdtDownloader
-    {
-        // Direct CDN link to ODT setup.exe (no self-extractor needed)
-        private const string OdtDownloadUrl = "https://officecdn.microsoft.com/pr/wsus/setup.exe";
-
-        public event Action<string> StatusChanged;
-
-        public string OdtFolder { get; private set; }
-        public string SetupExePath { get; private set; }
-
-        public OdtDownloader()
-        {
-            OdtFolder = Path.Combine(Path.GetTempPath(), "InstaSoftODT");
-        }
-
-        public async Task<bool> DownloadAndExtractAsync()
-        {
-            try
-            {
-                SetupExePath = Path.Combine(OdtFolder, "setup.exe");
-
-                // Check if valid setup.exe already exists
-                if (File.Exists(SetupExePath))
-                {
-                    var existingSize = new FileInfo(SetupExePath).Length;
-                    if (existingSize > 1000000) // valid setup.exe is ~7MB
-                    {
-                        StatusChanged?.Invoke("Az ODT setup.exe m\u00e1r el\u00e9rhet\u0151 (" +
-                            (existingSize / 1024 / 1024) + " MB).");
-                        return true;
-                    }
-
-                    // Delete corrupted file
-                    StatusChanged?.Invoke("S\u00e9r\u00fclt setup.exe t\u00f6rl\u00e9se...");
-                    File.Delete(SetupExePath);
-                }
-
-                Directory.CreateDirectory(OdtFolder);
-
-                // Download setup.exe directly from CDN
-                StatusChanged?.Invoke("Office Deployment Tool let\u00f6lt\u00e9se...");
-                StatusChanged?.Invoke("URL: " + OdtDownloadUrl);
-
-                using (var handler = new HttpClientHandler { AllowAutoRedirect = true })
-                using (var client = new HttpClient(handler))
-                {
-                    client.DefaultRequestHeaders.Add("User-Agent", "InstaSoftOfficeTool/1.0");
-                    client.Timeout = TimeSpan.FromMinutes(5);
-
-                    var response = await client.GetAsync(OdtDownloadUrl);
-
-                    if (!response.IsSuccessStatusCode)
-                    {
-                        StatusChanged?.Invoke("Hiba: HTTP " + (int)response.StatusCode + " " + response.StatusCode);
-                        return false;
-                    }
-
-                    var contentType = response.Content.Headers.ContentType?.MediaType ?? "";
-                    if (contentType.Contains("text/html"))
-                    {
-                        StatusChanged?.Invoke("Hiba: HTML oldal \u00e9rkezett exe helyett.");
-                        StatusChanged?.Invoke("T\u00f6ltse le manu\u00e1lisan: https://www.microsoft.com/en-us/download/details.aspx?id=49117");
-                        return false;
-                    }
-
-                    var bytes = await response.Content.ReadAsByteArrayAsync();
-                    File.WriteAllBytes(SetupExePath, bytes);
-
-                    StatusChanged?.Invoke("Let\u00f6ltve: " + (bytes.Length / 1024) + " KB");
-                }
-
-                if (!File.Exists(SetupExePath) || new FileInfo(SetupExePath).Length < 1000000)
-                {
-                    StatusChanged?.Invoke("Hiba: A let\u00f6lt\u00f6tt f\u00e1jl s\u00e9r\u00fclt vagy t\u00fal kicsi.");
-                    return false;
-                }
-
-                StatusChanged?.Invoke("ODT setup.exe k\u00e9sz.");
-                return true;
-            }
-            catch (Exception ex)
-            {
-                StatusChanged?.Invoke("Hiba: " + ex.GetType().Name + ": " + ex.Message);
-                return false;
-            }
-        }
-
-        public async Task<int> RunSetupAsync(string configXmlPath, Action<string> outputCallback)
-        {
-            var runner = new ProcessRunner();
-            runner.OutputReceived += line => outputCallback?.Invoke(line);
-
-            StatusChanged?.Invoke("Office telep\u00edt\u00e9s ind\u00edt\u00e1sa...");
-            return await runner.RunAsync(SetupExePath, "/configure \"" + configXmlPath + "\"");
-        }
-
-        public async Task<int> RunRemoveAsync(string configXmlPath, Action<string> outputCallback)
-        {
-            var runner = new ProcessRunner();
-            runner.OutputReceived += line => outputCallback?.Invoke(line);
-
-            StatusChanged?.Invoke("Office elt\u00e1vol\u00edt\u00e1s ind\u00edt\u00e1sa...");
-            return await runner.RunAsync(SetupExePath, "/configure \"" + configXmlPath + "\"");
-        }
-    }
-}