v1.16 — Remove PowerShell edition, restore flat project structure

PowerShell version removed — will use OV code signing certificate instead.
Files moved back from src/ to project root.

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

Services/ProcessRunner.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Diagnostics;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace InstaSoftOfficeTool.Services
+{
+    public class ProcessRunner
+    {
+        public event Action<string> OutputReceived;
+
+        public async Task<int> RunAsync(string fileName, string arguments, bool redirectOutput = true)
+        {
+            var psi = new ProcessStartInfo
+            {
+                FileName = fileName,
+                Arguments = arguments,
+                UseShellExecute = false,
+                CreateNoWindow = true,
+                RedirectStandardOutput = redirectOutput,
+                RedirectStandardError = redirectOutput,
+                StandardOutputEncoding = redirectOutput ? Encoding.UTF8 : null,
+                StandardErrorEncoding = redirectOutput ? Encoding.UTF8 : null
+            };
+
+            using (var process = new Process { StartInfo = psi })
+            {
+                if (redirectOutput)
+                {
+                    process.OutputDataReceived += (s, e) =>
+                    {
+                        if (e.Data != null)
+                            OutputReceived?.Invoke(e.Data);
+                    };
+                    process.ErrorDataReceived += (s, e) =>
+                    {
+                        if (e.Data != null)
+                            OutputReceived?.Invoke("[HIBA] " + e.Data);
+                    };
+                }
+
+                process.Start();
+
+                if (redirectOutput)
+                {
+                    process.BeginOutputReadLine();
+                    process.BeginErrorReadLine();
+                }
+
+                await Task.Run(() => process.WaitForExit());
+                return process.ExitCode;
+            }
+        }
+
+        public async Task<string> RunAndCaptureAsync(string fileName, string arguments)
+        {
+            var sb = new StringBuilder();
+            OutputReceived += line => sb.AppendLine(line);
+            await RunAsync(fileName, arguments);
+            return sb.ToString();
+        }
+    }
+}