No workspace package paths are detected on Windows

[felixxxxxs]

I was trying to setup ardatan/graphql-tools , but running yarn build did not output √ Built graphql-tools, instead an error was thrown by the postinstall script because the build files were not found.

I found out that the util function getWorkspacePackagePaths returns an empty array. This is because the glob pattern is resolved with a path.join call in it, when it should instead be path.posix.join, as glob patterns can only contain forward slashes (see https://github.com/sindresorhus/globby?tab=readme-ov-file#api).