Fix: declare ft_printf with extern "C" in print.hpp

[Copilot]

ft_printf was called in utils/print.hpp without a declaration, causing a compile error when the C function was referenced from C++ translation units due to name mangling.

Changes

• utils/print.hpp: Added extern "C" declaration for ft_printf so the C++ compiler resolves it with C linkage against libftprintf.

extern "C"
{
    int ft_printf(const char *format, ...);
}

Original prompt

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This section details on the original issue you should resolve

<issue_title>Issues with compiling</issue_title>
<issue_description>The terminal indicated that

In file included from tests/c_test.cpp:10:utils/print.hpp:66:18: error: use of undeclared identifier 'ft_printf' ft_printfRet = ft_printf(s, args...); write(1, &eof, 1);

Need to include this line at the top of print.hpp for the code to work

extern "C" { int ft_printf(const char *format, ...); }</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Issues with compiling #29

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