Updated fmt library to v10 to address some compilation issues on macOS 13

[jeff-cohere]

Hi there! I encountered some compilation errors on macOS Ventura, likely from the very different C++ compiler (see below). I was able to pull in the most recent release of the fmt library and fix the issues introduced there by casting a few arguments being formatted. I'm not 100% sure I did everything properly, but I figured it would be good to see the CI results. With these fixes, slade builds and runs on my M1 Mac laptop.

Here are the errors I saw from the version of fmt in the master branch:

/Users/jeffreyjohnson/projects/gamedev/slade/thirdparty/fmt/src/format.cc:14:37: error: redefinition of 'basic_data'
template <typename T = void> struct basic_data {
                                    ^
/opt/homebrew/include/fmt/format.h:1739:37: note: previous definition is here
template <typename T = void> struct basic_data {
                                    ^
/Users/jeffreyjohnson/projects/gamedev/slade/thirdparty/fmt/src/format.cc:68:58: error: use of undeclared identifier 'FMT_SNPRINTF'
  int (*snprintf_ptr)(char*, size_t, const char*, ...) = FMT_SNPRINTF;
                                                         ^
/Users/jeffreyjohnson/projects/gamedev/slade/thirdparty/fmt/src/format.cc:74:5: error: variable cannot be defined in an explicit instantiation; if this declaration is meant to be a variable definition, remove the 'template' keyword
    FMT_NOEXCEPT;
    ^
/Users/jeffreyjohnson/projects/gamedev/slade/thirdparty/fmt/src/format.cc:73:58: error: out-of-line declaration of 'to_decimal' does not match any declaration in namespace 'fmt::detail::dragonbox'
template FMT_API dragonbox::decimal_fp<float> dragonbox::to_decimal(float x)
                                                         ^~~~~~~~~~
/Users/jeffreyjohnson/projects/gamedev/slade/thirdparty/fmt/src/format.cc:73:77: error: expected ';' at end of declaration
template FMT_API dragonbox::decimal_fp<float> dragonbox::to_decimal(float x)
                                                                            ^
                                                                            ;
/Users/jeffreyjohnson/projects/gamedev/slade/thirdparty/fmt/src/format.cc:74:5: error: C++ requires a type specifier for all declarations
    FMT_NOEXCEPT;
    ^
/Users/jeffreyjohnson/projects/gamedev/slade/thirdparty/fmt/src/format.cc:76:5: error: variable cannot be defined in an explicit instantiation; if this declaration is meant to be a variable definition, remove the 'template' keyword
    FMT_NOEXCEPT;
    ^
/Users/jeffreyjohnson/projects/gamedev/slade/thirdparty/fmt/src/format.cc:75:59: error: out-of-line declaration of 'to_decimal' does not match any declaration in namespace 'fmt::detail::dragonbox'
template FMT_API dragonbox::decimal_fp<double> dragonbox::to_decimal(double x)
                                                          ^~~~~~~~~~
/Users/jeffreyjohnson/projects/gamedev/slade/thirdparty/fmt/src/format.cc:75:79: error: expected ';' at end of declaration
template FMT_API dragonbox::decimal_fp<double> dragonbox::to_decimal(double x)
                                                                              ^
                                                                              ;
/Users/jeffreyjohnson/projects/gamedev/slade/thirdparty/fmt/src/format.cc:76:5: error: C++ requires a type specifier for all declarations
    FMT_NOEXCEPT;
    ^
/Users/jeffreyjohnson/projects/gamedev/slade/thirdparty/fmt/src/format.cc:101:46: error: expected '(' for function-style cast or type construction
    basic_format_args<FMT_BUFFER_CONTEXT(char)>, detail::locale_ref);
                                         ~~~~^
/Users/jeffreyjohnson/projects/gamedev/slade/thirdparty/fmt/src/format.cc:99:31: error: explicit instantiation of 'vformat_to' does not refer to a function template, variable template, member function, member class, or static data member
template FMT_API void detail::vformat_to(
                              ^
/opt/homebrew/include/fmt/format.h:4554:6: note: candidate template ignored: failed template argument deduction
void vformat_to(buffer<Char>& buf, basic_string_view<Char> fmt,
     ^
/Users/jeffreyjohnson/projects/gamedev/slade/thirdparty/fmt/src/format.cc:103:30: error: explicit instantiation of 'snprintf_float' does not refer to a function template, variable template, member function, member class, or static data member
template FMT_API int detail::snprintf_float(double, int, detail::float_specs,
                             ^
/Users/jeffreyjohnson/projects/gamedev/slade/thirdparty/fmt/src/format.cc:105:30: error: explicit instantiation of 'snprintf_float' does not refer to a function template, variable template, member function, member class, or static data member
template FMT_API int detail::snprintf_float(long double, int,
                             ^
14 errors generated.
make[2]: *** [src/external/fmt/CMakeFiles/fmt.dir/src/format.cc.o] Error 1
make[1]: *** [src/external/fmt/CMakeFiles/fmt.dir/all] Error 2
make: *** [all] Error 2