Add Windows setup (setup.ps1), expand README with cross-platform install, Claude Desktop example, backup/restore, architecture diagram, .dockerignore

setup.ps1

@@ -0,0 +1,25 @@
+# Diligence — Windows Setup
+Write-Host "`n`e[36m💪 Diligence — Setup`e[0m`n"
+
+if (Test-Path .env) {
+    Write-Host "`e[33m.env already exists. Delete it first to regenerate.`e[0m"
+    exit 1
+}
+
+# Generate random SECRET_KEY (64 hex chars)
+$bytes = New-Object byte[] 32
+[System.Security.Cryptography.RandomNumberGenerator]::Fill($bytes)
+$secret = ($bytes | ForEach-Object { $_.ToString("x2") }) -join ""
+
+# Create .env from template
+Copy-Item .env.example .env
+(Get-Content .env) -replace "^SECRET_KEY=.*", "SECRET_KEY=$secret" | Set-Content .env
+
+Write-Host "`e[32m✅ .env created with random SECRET_KEY`e[0m"
+Write-Host ""
+Write-Host "Next steps:"
+Write-Host "  docker compose up -d"
+Write-Host "  Open http://localhost"
+Write-Host "  Register your account"
+Write-Host "  Configure integrations via Settings or your AI agent"
+Write-Host ""