Setup `vpx` and `vpr` shims even if users choose not to let vp manage node env

[liangmiQwQ]

Describe the bug

Refs: #2091 (comment)

For now, Vite+ skips run vp env setup --refresh when users choose not to let vp manage node env. However, vp env setup --refresh not only includes node env shims but also vpr and vpx shims. That will make these binary missed.

We have two different ways to handle this:

1. Always run vp env setup --refresh, and set system-first mode if users don't want Vp to manage their node versions (reduce confusion like this vpx shorthand does not get set up on Windows #2091 (comment), but behavior changes)
2. Still skip vp env setup --refresh, but manually generate these shims in the install program. (Minimal)

[liangmiQwQ]

@fengmk2 please take a look at these two options, I may handle this after the install script refactor.