Move nbgv script and stop checking for delta feature

.github/set-nbgv-version.ps1

@@ -0,0 +1,22 @@
+param(
+    [string]$version = $(nbgv get-version -v NuGetPackageVersion).Trim()
+)
+
+$scriptDir = "$PSScriptRoot/.."
+$path = Join-Path $scriptDir "Cargo.toml"
+Write-Host "Setting version to $version"
+
+(Get-Content $path) | ForEach-Object {
+    if ($_ -match '^version\s*=\s*".*"') {
+        $_ -replace '^version\s*=\s*".*"', "version = `"$version`""
+    }
+    else {
+        $_
+    }
+} | Set-Content $path
+
+Set-Location "$scriptDir/src/lib-nodejs"
+npm version $version --no-git-tag-version
+
+Copy-Item -Path "$scriptDir/README_NUGET.md" -Destination "$scriptDir/src/lib-nodejs/README.md" -Force
+Copy-Item -Path "$scriptDir/README_NUGET.md" -Destination "$scriptDir/src/lib-rust/README.md" -Force