Updating next package to 15.1.3 and added copyfiles in dev dependency

[codewithshinde]

Changes:
upgraded next to 15.1.3

I have added copyfiles as a development dependency because the cp command is not supported in the Windows Command Prompt during the build process. This change ensures that our build script works seamlessly across different operating systems, including Windows.

[Ovyerus]

I would rather not add another dependency just for copying; if you use PowerShell (specifically the more up to date PowerShell Core, not sure about the built in Windows PowerShell), it comes with a cp alias and can understand the -r flag just fine from what I can remember, so it should work fine here.

[codewithshinde]

I would rather not add another dependency just for copying; if you use PowerShell (specifically the more up to date PowerShell Core, not sure about the built in Windows PowerShell), it comes with a cp alias and can understand the -r flag just fine from what I can remember, so it should work fine here.

I 100% Agree with your point, I have added it to maintain the repo for "Cross-Platform Consistency"
For users who may not be familiar with PowerShell, using a dedicated library can provide a more straightforward API or command-line interface.

I can remove the change of copyfiles, Is the next js upgrade good with you?

[Ovyerus]

Yeah the Next.js upgrade is fine.

If copying does turn out to be a bigger issue, a simpler script using fs.cp can probably be devised.

[codewithshinde]

Yeah the Next.js upgrade is fine.

If copying does turn out to be a bigger issue, a simpler script using fs.cp can probably be devised.

I have added a script file instead.