feat: Phase 4.5 — Déploiement multi-plateforme v0.4.5

- service.v: --install-service / --uninstall-service / --service-status
  Windows (sc.exe SCM), Linux systemd, Linux openrc — auto-détection OS
- main.v: nouveaux flags service, help mis à jour
- Dockerfile: multi-stage (V from source → alpine:3.20 minimal)
- docker-compose.yml: prêt à l'emploi avec healthcheck
- scripts/install.sh: one-liner Linux (detect OS/arch, build, install)
- scripts/install.ps1: one-liner Windows PowerShell

Docs: ROADMAP Phase 4.5 marqué DONE, version 0.4.5

scripts/install.ps1

@@ -0,0 +1,65 @@
+# ntfy-bridge Windows installer
+# Run: powershell -ExecutionPolicy Bypass -File install.ps1
+
+param(
+    [string]$ConfigPath = "ntfy-bridge.yaml"
+)
+
+$ErrorActionPreference = "Stop"
+
+Write-Host "╔══════════════════════════════════════════════════════════════╗" -ForegroundColor Cyan
+Write-Host "║           ntfy-bridge Windows installer                      ║" -ForegroundColor Cyan
+Write-Host "╚══════════════════════════════════════════════════════════════╝" -ForegroundColor Cyan
+Write-Host ""
+
+# Check if V is installed
+$v = Get-Command v -ErrorAction SilentlyContinue
+if (-not $v) {
+    Write-Host "V compiler not found. Downloading..."
+    
+    # Download V weekly build
+    $vUrl = "https://github.com/vlang/v/releases/download/weekly.2024.32/v_windows.zip"
+    $vZip = "$env:TEMP\v_windows.zip"
+    $vDir = "$env:LOCALAPPDATA\v"
+    
+    Invoke-WebRequest -Uri $vUrl -OutFile $vZip
+    Expand-Archive -Path $vZip -DestinationPath $vDir -Force
+    Remove-Item $vZip
+    
+    $env:PATH = "$vDir\v;$env:PATH"
+    Write-Host "V installed to $vDir"
+}
+
+# Build
+Write-Host "Building ntfy-bridge..."
+v -prod -o ntfy-bridge.exe .
+
+# Copy to a permanent location
+$installDir = "$env:ProgramFiles\ntfy-bridge"
+New-Item -ItemType Directory -Force -Path $installDir | Out-Null
+Copy-Item -Force ntfy-bridge.exe $installDir\
+Copy-Item -Force dashboard.html $installDir\
+
+# Copy example config if not exists
+if (-not (Test-Path "$installDir\ntfy-bridge.yaml")) {
+    Copy-Item ntfy-bridge.example.yaml "$installDir\ntfy-bridge.yaml"
+    Write-Host ""
+    Write-Host "  ⚠️  Edit $installDir\ntfy-bridge.yaml to configure your sources!" -ForegroundColor Yellow
+}
+
+# Install as Windows service
+Write-Host "Installing as Windows service..."
+& "$installDir\ntfy-bridge.exe" --install-service --config "$installDir\ntfy-bridge.yaml" 2>&1 | Out-Null
+
+Write-Host ""
+Write-Host "Done! ntfy-bridge is installed and running as a Windows service." -ForegroundColor Green
+Write-Host ""
+Write-Host "  Install dir: $installDir"
+Write-Host "  Config:      $installDir\ntfy-bridge.yaml"
+Write-Host "  Dashboard:   http://localhost:9090/"
+Write-Host "  Health:      http://localhost:9090/health"
+Write-Host ""
+Write-Host "  Service commands:"
+Write-Host "    sc query ntfy-bridge"
+Write-Host "    sc stop ntfy-bridge"
+Write-Host "    sc start ntfy-bridge"