Feature: Set --version-file-strategy default value to recursive instead of local

[zanminkian]

The usage in readme is not the best practice. The best practice is to eval "$(fnm env --use-on-cd --version-file-strategy recursive)".

There are many issues because of the local default value.

• fnm doesn’t automatically change versions with .node-version or .nvmrc files #433 (comment)
• --use-on-cd should revert to default node #442 (comment)
• Document or set the recursive strategy as default with --use-on-cd #680