Add dedicated Geometry Unity package

scripts/build-geometry-unity-package.ps1

@@ -0,0 +1,70 @@
+param(
+  [string] $Configuration = "Release",
+  [string] $OutputDirectory = "artifacts\unity\org.gamecult.geometry",
+  [string] $CultMathCandidateFeed = "..\CultMath\.tools\local-feed"
+)
+
+$ErrorActionPreference = "Stop"
+
+$repoRoot = Split-Path -Parent $PSScriptRoot
+$projectPath = Join-Path $repoRoot "src\GameCult.Geometry\GameCult.Geometry.csproj"
+$templateRoot = Join-Path $repoRoot "unity\org.gamecult.geometry"
+$publishRoot = Join-Path $repoRoot "artifacts\geometry-unity-publish"
+$outputRoot = if ([System.IO.Path]::IsPathRooted($OutputDirectory)) {
+  $OutputDirectory
+} else {
+  Join-Path $repoRoot $OutputDirectory
+}
+$candidateFeed = if ([System.IO.Path]::IsPathRooted($CultMathCandidateFeed)) {
+  $CultMathCandidateFeed
+} else {
+  Join-Path $repoRoot $CultMathCandidateFeed
+}
+$pluginRoot = Join-Path $outputRoot "Runtime\Plugins"
+
+if (-not (Test-Path -LiteralPath (Join-Path $candidateFeed "CultMath.0.1.0-geometry-migration.1.nupkg"))) {
+  throw "CultMath migration candidate is missing from $candidateFeed. Pack CultMath before staging Geometry."
+}
+
+if (Test-Path -LiteralPath $publishRoot) {
+  Remove-Item -LiteralPath $publishRoot -Recurse -Force
+}
+if (Test-Path -LiteralPath $outputRoot) {
+  Remove-Item -LiteralPath $outputRoot -Recurse -Force
+}
+
+dotnet restore $projectPath --disable-build-servers -p:CultMathCandidateFeed=$candidateFeed -p:UseSharedCompilation=false -m:1
+if ($LASTEXITCODE -ne 0) {
+  throw "GameCult.Geometry restore failed with exit code $LASTEXITCODE"
+}
+
+dotnet publish $projectPath -c $Configuration -o $publishRoot --no-restore --disable-build-servers -p:UseSharedCompilation=false -m:1
+if ($LASTEXITCODE -ne 0) {
+  throw "GameCult.Geometry publish failed with exit code $LASTEXITCODE"
+}
+
+New-Item -ItemType Directory -Force -Path $pluginRoot | Out-Null
+Copy-Item -LiteralPath (Join-Path $templateRoot "package.json") -Destination $outputRoot
+Copy-Item -LiteralPath (Join-Path $templateRoot "README.md") -Destination $outputRoot
+Copy-Item -LiteralPath (Join-Path $templateRoot "Runtime\GameCult.Geometry.asmdef") -Destination (Join-Path $outputRoot "Runtime")
+
+$geometryAssembly = Join-Path $publishRoot "GameCult.Geometry.dll"
+if (-not (Test-Path -LiteralPath $geometryAssembly)) {
+  throw "Geometry Unity package is missing GameCult.Geometry.dll"
+}
+Copy-Item -LiteralPath $geometryAssembly -Destination $pluginRoot
+$geometrySymbols = [System.IO.Path]::ChangeExtension($geometryAssembly, ".pdb")
+if (Test-Path -LiteralPath $geometrySymbols) {
+  Copy-Item -LiteralPath $geometrySymbols -Destination $pluginRoot
+}
+
+$manifest = Get-Content -LiteralPath (Join-Path $outputRoot "package.json") -Raw | ConvertFrom-Json
+$stagedAssemblies = @(Get-ChildItem -LiteralPath $pluginRoot -Filter "*.dll")
+if ($stagedAssemblies.Count -ne 1 -or $stagedAssemblies[0].Name -ne "GameCult.Geometry.dll") {
+  throw "Geometry package must stage only its owned assembly; found: $($stagedAssemblies.Name -join ', ')"
+}
+
+Write-Host "GameCult.Geometry Unity package: $outputRoot"
+Write-Host "Package: $($manifest.name)@$($manifest.version)"
+Write-Host "Dependencies: $($manifest.dependencies.PSObject.Properties.Name -join ', ')"
+Write-Host "Managed assemblies: $($stagedAssemblies.Count)"