Implement autostart functionality, ZIP packaging, and related installation scripts; update documentation and tests

Packaging/Uninstall.ps1

@@ -0,0 +1,22 @@
+$ErrorActionPreference = 'Stop'
+$target = [IO.Path]::GetFullPath($PSScriptRoot).TrimEnd('\')
+if (!(Test-Path -LiteralPath (Join-Path $target '.musicbridge-install'))) { throw 'Installation marker is missing; refusing deletion.' }
+if ($target -eq [IO.Path]::GetPathRoot($target)) { throw 'Unsafe directory.' }
+$exe = Join-Path $target 'MusicBridge.Agent.exe'
+if (Test-Path -LiteralPath $exe) {
+    try { $probe = [IO.File]::Open($exe, 'Open', 'ReadWrite', 'None'); $probe.Dispose() }
+    catch { throw 'Close MusicBridge from its tray menu first.' }
+}
+$run = 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Run'
+$command = (Get-ItemProperty -LiteralPath $run -Name 'MusicBridge.Agent' -ErrorAction SilentlyContinue).'MusicBridge.Agent'
+if ($command -and $command.StartsWith('"' + $exe + '"', [StringComparison]::OrdinalIgnoreCase)) {
+    Remove-ItemProperty -LiteralPath $run -Name 'MusicBridge.Agent'
+}
+$link = Join-Path ([Environment]::GetFolderPath('Programs')) 'MusicBridge.lnk'
+if (Test-Path -LiteralPath $link) {
+    $shell = New-Object -ComObject WScript.Shell
+    if ($shell.CreateShortcut($link).TargetPath -eq $exe) { Remove-Item -LiteralPath $link }
+}
+# Delete only the verified installed directory, preserving %LOCALAPPDATA%\MusicBridge identity.
+Remove-Item -LiteralPath $target -Recurse -Force
+Write-Host 'MusicBridge removed. Pairing identity was preserved.'