[feature] Building without flashfetch

Description:

I think it would be appropriate to build fastfetch without flashfetch binary.

It is not useful* and it's just doubling the size of the package.

This can be easily done by adding --target fastfetch to cmake --build.

Additional info:

*The developer's response about flashfetch: https://github.com/fastfetch-cli/fastfetch/discussions/627

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