Add F4SE plugin template

Create a minimal Fallout 4 F4SE/CommonLibF4 starter repo with build, packaging, install, and rename scripts, plus initial plugin source, headers, and xmake configuration.

scripts/install-dev.ps1

@@ -0,0 +1,15 @@
+param(
+    [Parameter(Mandatory=$true)]
+    [string]$Fallout4Path
+)
+
+$ErrorActionPreference = "Stop"
+
+$root = Split-Path -Parent $PSScriptRoot
+$plugins = Join-Path $root "package\F4SE\Plugins"
+$target = Join-Path $Fallout4Path "Data\F4SE\Plugins"
+
+New-Item -ItemType Directory -Force -Path $target | Out-Null
+Copy-Item -Path (Join-Path $plugins "*") -Destination $target -Force
+
+Write-Host "Installed plugin files to $target"

scripts/package.ps1

@@ -0,0 +1,16 @@
+param(
+    [string]$OutputName = "F4SEPluginTemplate"
+)
+
+$ErrorActionPreference = "Stop"
+
+$root = Split-Path -Parent $PSScriptRoot
+$packageDir = Join-Path $root "package"
+$outFile = Join-Path $root "$OutputName.zip"
+
+if (Test-Path $outFile) {
+    Remove-Item $outFile -Force
+}
+
+Compress-Archive -Path (Join-Path $packageDir "*") -DestinationPath $outFile
+Write-Host "Created $outFile"

scripts/rename-template.ps1

@@ -0,0 +1,23 @@
+param(
+    [Parameter(Mandatory=$true)]
+    [string]$NewName,
+
+    [string]$Author = "YourName"
+)
+
+$ErrorActionPreference = "Stop"
+
+$root = Split-Path -Parent $PSScriptRoot
+$files = Get-ChildItem -Path $root -Recurse -File | Where-Object {
+    $_.FullName -notmatch "\\\.git\\" -and
+    $_.FullName -notmatch "\\lib\\commonlibf4\\"
+}
+
+foreach ($file in $files) {
+    $content = Get-Content $file.FullName -Raw
+    $content = $content.Replace("F4SEPluginTemplate", $NewName)
+    $content = $content.Replace("YourName", $Author)
+    Set-Content -Path $file.FullName -Value $content -NoNewline
+}
+
+Write-Host "Renamed template references to $NewName"