Include wrappers for pnpm and yarn #109
Description
In #105 you added corepack to the build in response to #103. Thanks very much for your effort on that!
However, the corepack executable itself is only used to setup symlinks to the pnpm and yarn wrappers also provided by corepack. It is those wrappers that download and run the appropriate version of those tools.
Therefore, to actually allow pnpm and yarn to be used with this package, the pnpm and yarn wrappers also need to be included.