Establish EveUnity runtime owner repo

scripts/pack.ps1

@@ -0,0 +1,27 @@
+param(
+  [string] $OutputRoot = "artifacts\packages"
+)
+
+$ErrorActionPreference = "Stop"
+
+$repoRoot = Split-Path -Parent $PSScriptRoot
+$packageRoot = Join-Path $repoRoot "packages\org.gamecult.eve.unity-scene"
+$output = if ([System.IO.Path]::IsPathRooted($OutputRoot)) {
+  $OutputRoot
+} else {
+  Join-Path $repoRoot $OutputRoot
+}
+
+New-Item -ItemType Directory -Force -Path $output | Out-Null
+$packed = npm pack $packageRoot --pack-destination $output
+if ($LASTEXITCODE -ne 0) {
+  throw "EveUnity UPM package failed to pack"
+}
+
+$artifact = Join-Path $output ($packed | Select-Object -Last 1)
+if (-not (Test-Path -LiteralPath $artifact)) {
+  throw "EveUnity package artifact was not produced: $artifact"
+}
+
+Write-Host "EveUnity package: $artifact"
+