fix: fix VS2022 shadowing issues

src/core-fmt/include/units/bits/fmt.h

@@ -52,11 +52,11 @@ private:
   unsigned char size_ = 1;
 
 public:
-  constexpr void operator=(std::basic_string_view<Char> s)
+  constexpr void operator=(std::basic_string_view<Char> str)
   {
-    auto size = s.size();
+    auto size = str.size();
     if (size > max_size) return throw STD_FMT::format_error("invalid fill");
-    for (size_t i = 0; i < size; ++i) data_[i] = s[i];
+    for (size_t i = 0; i < size; ++i) data_[i] = str[i];
     size_ = static_cast<unsigned char>(size);
   }
 

src/core-fmt/include/units/format.h

@@ -319,7 +319,7 @@ private:
     constexpr void on_fill(std::basic_string_view<CharT> fill) { f.specs.global.fill = fill; }
     constexpr void on_align(units::detail::fmt_align align) { f.specs.global.align = align; }
     constexpr void on_width(int width) { f.specs.global.width = width; }
-    constexpr void on_sign(units::detail::fmt_sign s) { f.specs.rep.sign = s; }
+    constexpr void on_sign(units::detail::fmt_sign sign) { f.specs.rep.sign = sign; }
     constexpr void on_hash() { f.specs.rep.alt = true; }
     constexpr void on_precision(int precision) { f.specs.rep.precision = precision; }
     constexpr void on_localized() { f.specs.rep.localized = true; }