Fix Windows server install with installDir containing space

[longzheng]

Addresses issue with installing on Windows when the user profile directory contains a path, e.g. C:\Users\john doe https://discord.com/channels/882329362295316500/1237486685030322176/1238683790562431066

The child_process.spawn with shell: true (required for Node 20.12.2 on Windows) would fail if there are spaces in the path

[longzheng]

Examples

C:\Users\john doe>npx -y scrypted install-server
install-server version: undefined
running npm.cmd "--prefix" "C:\Users\john doe\.scrypted" "install" "--production" "@scrypted/server@latest"

C:\Users\john doe>npx -y scrypted serve
cwd C:\Users\john doe\.scrypted
Starting scrypted main...
running npm.cmd "--prefix" "C:\Users\john doe\.scrypted" "exec" "scrypted-serve"