feat(installer): Add bun as a JS package manager/runtime (windows)

[TheBearodactyl]

Description

Adds bun as a js package manager/runtime in the installer script for windows

How Has This Been Tested?

Just like with the linux installer script, i've run it on my machine, both with and without bun installed.

[kylo252]

you can simplify all of this by detecting if bun is available and use it in install_nodejs_deps() similar to how we do it in the bash installer.

I think it would look something like this

function install_nodejs_deps() {
    try {
        if (Get-Command "bun" -ErrorAction SilentlyContinue) { 
            Set-Alias pkg_manager "bun" -Scope Private
        } else {
            Set-Alias pkg_manager "npm" -Scope Private
            check_system_dep "node"
        }
        Invoke-Command -ScriptBlock { pkg_manager install --global neovim tree-sitter-cli } -ErrorAction Break
    } catch {
        print_missing_dep_msg "$dep"
    }
}