Prefix all size_t with std::

done automatically by executing regex replace `([^:0-9a-zA-Z_])size_t([^0-9a-zA-Z_])` -> `$1std::size_t$2`

src/core/file_sys/archive_backend.cpp

@@ -102,7 +102,7 @@ std::vector<u8> Path::AsBinary() const {
     case LowPathType::Wchar: {
         // use two u8 for each character of u16str
         std::vector<u8> to_return(u16str.size() * 2);
-        for (size_t i = 0; i < u16str.size(); ++i) {
+        for (std::size_t i = 0; i < u16str.size(); ++i) {
             u16 tmp_char = u16str.at(i);
             to_return[i * 2] = (tmp_char & 0xFF00) >> 8;
             to_return[i * 2 + 1] = (tmp_char & 0x00FF);