fix: replace spawn with execa to fix Windows compatibility

[JohanManders]

Description

This PR replaces the usage of spawn with execa to resolve compatibility issues on Windows systems.

Changes Made

• Replaced all occurrences of spawn with execa in the installStudio function.
• Ensured that Prisma Studio runs asynchronously without blocking the execution of the rest of the code.

Issue

Should fix issues #35 and #13

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Name	Status	Preview	Comments	Updated (UTC)
nuxt-prisma	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 9, 2024 11:44am

[BlueBazze]

It is technically possible that the user does not have npx installed.

Remember seeing this function, havent played with it.
https://devtools.nuxt.com/module/utils-kit#startsubprocess

[JohanManders]

It is technically possible that the user does not have npx installed.

Remember seeing this function, havent played with it. https://devtools.nuxt.com/module/utils-kit#startsubprocess

The original implementation already relies on npx, as do several other functions within this file, so npx should be available in the environment where this code is running. Given that context, I believe the PR maintains consistency with the existing codebase without introducing additional dependencies.

[husayt]

@ankur-arch this also looks like easy fix to another blocker. Will be great to adopt it

[ankur-arch]

@husayt I'm currently cleaning up the repo and release process a bit. Will test and merge this soon.