Restructure dependencies and update to C++20

- Nuked static_assert from almost everywhere in the project
- Nuked binary dependency support. Might add one later though
- Separated dependency headers into a separate include subdirectory
- Grafted a thirdpartylegalnotices.txt generator from RITEG
- Pushed development snapshot version to 2126 (26th week of 2025)

1 files changed, 48 insertions, 0 deletions

diff --git a/deps/spdlog/src/bundled_fmtlib_format.cpp b/deps/spdlog/src/bundled_fmtlib_format.cpp
new file mode 100644
index 0000000..462508d
--- /dev/null
+++ b/deps/spdlog/src/bundled_fmtlib_format.cpp
@@ -0,0 +1,48 @@
+// Slightly modified version of fmt lib's format.cc source file.
+// Copyright (c) 2012 - 2016, Victor Zverovich
+// All rights reserved.
+
+#ifndef SPDLOG_COMPILED_LIB
+    #error Please define SPDLOG_COMPILED_LIB to compile this file.
+#endif
+
+#if !defined(SPDLOG_FMT_EXTERNAL) && !defined(SPDLOG_USE_STD_FORMAT)
+
+    #include <spdlog/fmt/bundled/format-inl.h>
+
+FMT_BEGIN_NAMESPACE
+namespace detail {
+
+template FMT_API auto dragonbox::to_decimal(float x) noexcept
+    -> dragonbox::decimal_fp<float>;
+template FMT_API auto dragonbox::to_decimal(double x) noexcept
+    -> dragonbox::decimal_fp<double>;
+
+#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
+template FMT_API locale_ref::locale_ref(const std::locale& loc);
+template FMT_API auto locale_ref::get<std::locale>() const -> std::locale;
+#endif
+
+// Explicit instantiations for char.
+
+template FMT_API auto thousands_sep_impl(locale_ref)
+    -> thousands_sep_result<char>;
+template FMT_API auto decimal_point_impl(locale_ref) -> char;
+
+template FMT_API void buffer<char>::append(const char*, const char*);
+
+template FMT_API void vformat_to(buffer<char>&, string_view,
+                                 typename vformat_args<>::type, locale_ref);
+
+// Explicit instantiations for wchar_t.
+
+template FMT_API auto thousands_sep_impl(locale_ref)
+    -> thousands_sep_result<wchar_t>;
+template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t;
+
+template FMT_API void buffer<wchar_t>::append(const wchar_t*, const wchar_t*);
+
+}  // namespace detail
+FMT_END_NAMESPACE
+
+#endif  // !SPDLOG_FMT_EXTERNAL